diff --git a/adapters/rubicon/rubicon.go b/adapters/rubicon/rubicon.go
index 579af9839c7..84200431992 100644
--- a/adapters/rubicon/rubicon.go
+++ b/adapters/rubicon/rubicon.go
@@ -852,12 +852,14 @@ func (a *RubiconAdapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *ada
 		if request.Site != nil {
 			siteCopy := *request.Site
 			siteExtRP := rubiconSiteExt{RP: rubiconSiteExtRP{SiteID: rubiconExt.SiteId}}
-			target, err := updateExtWithIabAttribute(nil, siteCopy.Content.Data, []int{1, 2})
-			if err != nil {
-				errs = append(errs, err)
-				continue
+			if siteCopy.Content != nil {
+				target, err := updateExtWithIabAttribute(nil, siteCopy.Content.Data, []int{1, 2})
+				if err != nil {
+					errs = append(errs, err)
+					continue
+				}
+				siteExtRP.RP.Target = target
 			}
-			siteExtRP.RP.Target = target
 
 			siteCopy.Ext, err = json.Marshal(&siteExtRP)
 			if err != nil {
@@ -919,6 +921,9 @@ func resolveBidFloorAttributes(bidFloor float64, bidFloorCur string) (float64, s
 
 func updateExtWithIabAttribute(target json.RawMessage, data []openrtb2.Data, segTaxes []int) (json.RawMessage, error) {
 	var segmentIdsToCopy = getSegmentIdsToCopy(data, segTaxes)
+	if len(segmentIdsToCopy) == 0 {
+		return target, nil
+	}
 
 	extRPTarget := make(map[string]interface{})
 
@@ -938,7 +943,7 @@ func updateExtWithIabAttribute(target json.RawMessage, data []openrtb2.Data, seg
 }
 
 func getSegmentIdsToCopy(data []openrtb2.Data, segTaxValues []int) []string {
-	var segmentIdsToCopy = make([]string, 0)
+	var segmentIdsToCopy = make([]string, 0, len(data))
 
 	for _, dataRecord := range data {
 		if dataRecord.Ext != nil {
diff --git a/adapters/rubicon/rubicontest/supplemental/no-site-content-data.json b/adapters/rubicon/rubicontest/supplemental/no-site-content-data.json
new file mode 100644
index 00000000000..f67788a3154
--- /dev/null
+++ b/adapters/rubicon/rubicontest/supplemental/no-site-content-data.json
@@ -0,0 +1,293 @@
+{
+  "mockBidRequest": {
+    "id": "test-request-id",
+    "device": {
+      "ip": "123.123.123.123",
+      "ifa": "zxcjbzxmc-zxcbmz-zxbcz-zxczx"
+    },
+    "app": {
+      "id": "1",
+      "bundle": "com.wls.testwlsapplication"
+    },
+    "site": {
+      "content": {
+      }
+    },
+    "user": {
+      "data": [
+        {
+          "ext": {
+            "segtax": 4
+          },
+          "segment": [
+            {
+              "id": "idToCopy"
+            }
+          ]
+        },
+        {
+          "ext": {
+            "segtax": "someValue"
+          },
+          "segment": [
+            {
+              "id": "shouldNotBeCopied"
+            }
+          ]
+        },
+        {
+          "ext": {
+            "segtax": "4"
+          },
+          "segment": [
+            {
+              "id": "shouldNotBeCopied2"
+            }
+          ]
+        },
+        {
+          "ext": {
+            "segtax": 4
+          },
+          "segment": [
+            {
+              "id": "idToCopy2"
+            }
+          ]
+        },
+        {
+          "ext": {
+            "segtax": [
+              4
+            ]
+          },
+          "segment": [
+            {
+              "id": "shouldNotBeCopied3"
+            }
+          ]
+        }
+      ]
+    },
+    "imp": [
+      {
+        "id": "test-imp-id",
+        "instl": 1,
+        "video": {
+          "placement": 3,
+          "mimes": [
+            "video/mp4"
+          ],
+          "protocols": [
+            2,
+            5
+          ],
+          "w": 1024,
+          "h": 576
+        },
+        "bidfloor": 1,
+        "bidfloorcur": "EuR",
+        "ext": {
+          "bidder": {
+            "video": {
+            },
+            "accountId": 1001,
+            "siteId": 113932,
+            "zoneId": 535510
+          }
+        }
+      }
+    ]
+  },
+  "httpCalls": [
+    {
+      "expectedRequest": {
+        "uri": "uri?tk_xint=pbs-test-tracker",
+        "body": {
+          "id": "test-request-id",
+          "device": {
+            "ext": {
+              "rp": {
+                "pixelratio": 0
+              }
+            },
+            "ip": "123.123.123.123",
+            "ifa": "zxcjbzxmc-zxcbmz-zxbcz-zxczx"
+          },
+          "site": {
+            "content": {
+            },
+            "ext": {
+              "rp": {
+                "site_id": 113932
+              }
+            },
+            "publisher": {
+              "ext": {
+                "rp": {
+                  "account_id": 1001
+                }
+              }
+            }
+          },
+          "user": {
+            "data": [
+              {
+                "ext": {
+                  "segtax": 4
+                },
+                "segment": [
+                  {
+                    "id": "idToCopy"
+                  }
+                ]
+              },
+              {
+                "ext": {
+                  "segtax": "someValue"
+                },
+                "segment": [
+                  {
+                    "id": "shouldNotBeCopied"
+                  }
+                ]
+              },
+              {
+                "ext": {
+                  "segtax": "4"
+                },
+                "segment": [
+                  {
+                    "id": "shouldNotBeCopied2"
+                  }
+                ]
+              },
+              {
+                "ext": {
+                  "segtax": 4
+                },
+                "segment": [
+                  {
+                    "id": "idToCopy2"
+                  }
+                ]
+              },
+              {
+                "ext": {
+                  "segtax": [
+                    4
+                  ]
+                },
+                "segment": [
+                  {
+                    "id": "shouldNotBeCopied3"
+                  }
+                ]
+              }
+            ],
+            "ext": {
+              "rp": {
+                "target": {
+                  "iab": [
+                    "idToCopy",
+                    "idToCopy2"
+                  ]
+                }
+              }
+            }
+          },
+          "app": {
+            "id": "1",
+            "bundle": "com.wls.testwlsapplication"
+          },
+          "imp": [
+            {
+              "id": "test-imp-id",
+              "instl": 1,
+              "video": {
+                "placement": 3,
+                "ext": {
+                  "rp": {
+                    "size_id": 203
+                  }
+                },
+                "mimes": [
+                  "video/mp4"
+                ],
+                "protocols": [
+                  2,
+                  5
+                ],
+                "w": 1024,
+                "h": 576
+              },
+              "bidfloor": 1.2,
+              "bidfloorcur": "USD",
+              "ext": {
+                "rp": {
+                  "track": {
+                    "mint": "",
+                    "mint_version": ""
+                  },
+                  "zone_id": 535510
+                }
+              }
+            }
+          ]
+        }
+      },
+      "mockResponse": {
+        "status": 200,
+        "body": {
+          "id": "test-request-id",
+          "seatbid": [
+            {
+              "bid": [
+                {
+                  "id": "test_bid_id",
+                  "impid": "test-imp-id",
+                  "price": 0.27543,
+                  "adm": "some-test-ad",
+                  "cid": "test_cid",
+                  "crid": "test_crid",
+                  "dealid": "test_dealid",
+                  "ext": {
+                    "prebid": {
+                      "type": "video"
+                    }
+                  }
+                }
+              ],
+              "seat": "adman"
+            }
+          ],
+          "cur": "USD"
+        }
+      }
+    }
+  ],
+  "expectedBidResponses": [
+    {
+      "currency": "USD",
+      "bids": [
+        {
+          "bid": {
+            "id": "test_bid_id",
+            "impid": "test-imp-id",
+            "price": 0.27543,
+            "adm": "some-test-ad",
+            "cid": "test_cid",
+            "crid": "test_crid",
+            "dealid": "test_dealid",
+            "ext": {
+              "prebid": {
+                "type": "video"
+              }
+            }
+          },
+          "type": "video"
+        }
+      ]
+    }
+  ]
+}
diff --git a/adapters/rubicon/rubicontest/supplemental/no-site-content.json b/adapters/rubicon/rubicontest/supplemental/no-site-content.json
new file mode 100644
index 00000000000..d3b8f8b7454
--- /dev/null
+++ b/adapters/rubicon/rubicontest/supplemental/no-site-content.json
@@ -0,0 +1,289 @@
+{
+  "mockBidRequest": {
+    "id": "test-request-id",
+    "device": {
+      "ip": "123.123.123.123",
+      "ifa": "zxcjbzxmc-zxcbmz-zxbcz-zxczx"
+    },
+    "app": {
+      "id": "1",
+      "bundle": "com.wls.testwlsapplication"
+    },
+    "site": {
+    },
+    "user": {
+      "data": [
+        {
+          "ext": {
+            "segtax": 4
+          },
+          "segment": [
+            {
+              "id": "idToCopy"
+            }
+          ]
+        },
+        {
+          "ext": {
+            "segtax": "someValue"
+          },
+          "segment": [
+            {
+              "id": "shouldNotBeCopied"
+            }
+          ]
+        },
+        {
+          "ext": {
+            "segtax": "4"
+          },
+          "segment": [
+            {
+              "id": "shouldNotBeCopied2"
+            }
+          ]
+        },
+        {
+          "ext": {
+            "segtax": 4
+          },
+          "segment": [
+            {
+              "id": "idToCopy2"
+            }
+          ]
+        },
+        {
+          "ext": {
+            "segtax": [
+              4
+            ]
+          },
+          "segment": [
+            {
+              "id": "shouldNotBeCopied3"
+            }
+          ]
+        }
+      ]
+    },
+    "imp": [
+      {
+        "id": "test-imp-id",
+        "instl": 1,
+        "video": {
+          "placement": 3,
+          "mimes": [
+            "video/mp4"
+          ],
+          "protocols": [
+            2,
+            5
+          ],
+          "w": 1024,
+          "h": 576
+        },
+        "bidfloor": 1,
+        "bidfloorcur": "EuR",
+        "ext": {
+          "bidder": {
+            "video": {
+            },
+            "accountId": 1001,
+            "siteId": 113932,
+            "zoneId": 535510
+          }
+        }
+      }
+    ]
+  },
+  "httpCalls": [
+    {
+      "expectedRequest": {
+        "uri": "uri?tk_xint=pbs-test-tracker",
+        "body": {
+          "id": "test-request-id",
+          "device": {
+            "ext": {
+              "rp": {
+                "pixelratio": 0
+              }
+            },
+            "ip": "123.123.123.123",
+            "ifa": "zxcjbzxmc-zxcbmz-zxbcz-zxczx"
+          },
+          "site": {
+            "ext": {
+              "rp": {
+                "site_id": 113932
+              }
+            },
+            "publisher": {
+              "ext": {
+                "rp": {
+                  "account_id": 1001
+                }
+              }
+            }
+          },
+          "user": {
+            "data": [
+              {
+                "ext": {
+                  "segtax": 4
+                },
+                "segment": [
+                  {
+                    "id": "idToCopy"
+                  }
+                ]
+              },
+              {
+                "ext": {
+                  "segtax": "someValue"
+                },
+                "segment": [
+                  {
+                    "id": "shouldNotBeCopied"
+                  }
+                ]
+              },
+              {
+                "ext": {
+                  "segtax": "4"
+                },
+                "segment": [
+                  {
+                    "id": "shouldNotBeCopied2"
+                  }
+                ]
+              },
+              {
+                "ext": {
+                  "segtax": 4
+                },
+                "segment": [
+                  {
+                    "id": "idToCopy2"
+                  }
+                ]
+              },
+              {
+                "ext": {
+                  "segtax": [
+                    4
+                  ]
+                },
+                "segment": [
+                  {
+                    "id": "shouldNotBeCopied3"
+                  }
+                ]
+              }
+            ],
+            "ext": {
+              "rp": {
+                "target": {
+                  "iab": [
+                    "idToCopy",
+                    "idToCopy2"
+                  ]
+                }
+              }
+            }
+          },
+          "app": {
+            "id": "1",
+            "bundle": "com.wls.testwlsapplication"
+          },
+          "imp": [
+            {
+              "id": "test-imp-id",
+              "instl": 1,
+              "video": {
+                "placement": 3,
+                "ext": {
+                  "rp": {
+                    "size_id": 203
+                  }
+                },
+                "mimes": [
+                  "video/mp4"
+                ],
+                "protocols": [
+                  2,
+                  5
+                ],
+                "w": 1024,
+                "h": 576
+              },
+              "bidfloor": 1.2,
+              "bidfloorcur": "USD",
+              "ext": {
+                "rp": {
+                  "track": {
+                    "mint": "",
+                    "mint_version": ""
+                  },
+                  "zone_id": 535510
+                }
+              }
+            }
+          ]
+        }
+      },
+      "mockResponse": {
+        "status": 200,
+        "body": {
+          "id": "test-request-id",
+          "seatbid": [
+            {
+              "bid": [
+                {
+                  "id": "test_bid_id",
+                  "impid": "test-imp-id",
+                  "price": 0.27543,
+                  "adm": "some-test-ad",
+                  "cid": "test_cid",
+                  "crid": "test_crid",
+                  "dealid": "test_dealid",
+                  "ext": {
+                    "prebid": {
+                      "type": "video"
+                    }
+                  }
+                }
+              ],
+              "seat": "adman"
+            }
+          ],
+          "cur": "USD"
+        }
+      }
+    }
+  ],
+  "expectedBidResponses": [
+    {
+      "currency": "USD",
+      "bids": [
+        {
+          "bid": {
+            "id": "test_bid_id",
+            "impid": "test-imp-id",
+            "price": 0.27543,
+            "adm": "some-test-ad",
+            "cid": "test_cid",
+            "crid": "test_crid",
+            "dealid": "test_dealid",
+            "ext": {
+              "prebid": {
+                "type": "video"
+              }
+            }
+          },
+          "type": "video"
+        }
+      ]
+    }
+  ]
+}