diff --git a/LiteDB.Tests/Engine/Index_Tests.cs b/LiteDB.Tests/Engine/Index_Tests.cs
index 549f63194..bdd468c17 100644
--- a/LiteDB.Tests/Engine/Index_Tests.cs
+++ b/LiteDB.Tests/Engine/Index_Tests.cs
@@ -15,8 +15,8 @@ public void Index_With_No_Name()
                 var users = db.GetCollection("users");
                 var indexes = db.GetCollection("$indexes");
 
-                users.Insert(new BsonDocument {["name"] = new BsonDocument {["first"] = "John", ["last"] = "Doe"}});
-                users.Insert(new BsonDocument {["name"] = new BsonDocument {["first"] = "Marco", ["last"] = "Pollo"}});
+                users.Insert(new BsonDocument { ["name"] = new BsonDocument { ["first"] = "John", ["last"] = "Doe" } });
+                users.Insert(new BsonDocument { ["name"] = new BsonDocument { ["first"] = "Marco", ["last"] = "Pollo" } });
 
                 // no index name defined
                 users.EnsureIndex("name.last");
@@ -36,11 +36,11 @@ public void Index_Order()
                 var col = db.GetCollection("col");
                 var indexes = db.GetCollection("$indexes");
 
-                col.Insert(new BsonDocument {{"text", "D"}});
-                col.Insert(new BsonDocument {{"text", "A"}});
-                col.Insert(new BsonDocument {{"text", "E"}});
-                col.Insert(new BsonDocument {{"text", "C"}});
-                col.Insert(new BsonDocument {{"text", "B"}});
+                col.Insert(new BsonDocument { { "text", "D" } });
+                col.Insert(new BsonDocument { { "text", "A" } });
+                col.Insert(new BsonDocument { { "text", "E" } });
+                col.Insert(new BsonDocument { { "text", "C" } });
+                col.Insert(new BsonDocument { { "text", "B" } });
 
                 col.EnsureIndex("text");
 
@@ -139,5 +139,63 @@ public void EnsureIndex_Invalid_Arguments()
                 Assert.Equal("expression", exn.ParamName);
             }
         }
+
+        [Fact]
+        public void MultiKey_Index_Test()
+        {
+            using var db = new LiteDatabase("filename=:memory:");
+            var col = db.GetCollection("customers", BsonAutoId.Int32);
+            col.EnsureIndex("$.Phones[*].Type");
+
+            var doc1 = new BsonDocument
+            {
+                ["Name"] = "John Doe",
+                ["Phones"] = new BsonArray
+                (
+                    new BsonDocument 
+                    {
+                        ["Type"] = "Mobile",
+                        ["Number"] = "9876-5432"
+                    },
+                    new BsonDocument
+                    {
+                        ["Type"] = "Fixed",
+                        ["Number"] = "3333-3333"
+                    }
+                )
+            };
+
+            var doc2 = new BsonDocument
+            {
+                ["Name"] = "Jane Doe",
+                ["Phones"] = new BsonArray
+                (
+                    new BsonDocument
+                    {
+                        ["Type"] = "Fixed",
+                        ["Number"] = "3000-0000"
+                    }
+                )
+            };
+
+            col.Insert(doc1);
+            col.Insert(doc2);
+
+            var query1 = "select $ from customers where $.Phones[*].Type any = 'Mobile'";
+            var query2 = "select $ from customers where $.Phones[*].Type any = 'Fixed'";
+
+            var explain1 = db.Execute("explain " + query1).First();
+            Assert.True(!explain1["index"]["mode"].AsString.Contains("_id"));
+
+            var explain2 = db.Execute("explain " + query2).First();
+            Assert.True(!explain2["index"]["mode"].AsString.Contains("_id"));
+
+
+            var result1 = db.Execute(query1).ToArray();
+            Assert.True(result1.Length == 1);
+
+            var result2 = db.Execute(query2).ToArray();
+            Assert.True(result2.Length == 2);
+        }
     }
 }
\ No newline at end of file
diff --git a/LiteDB/Document/BsonArray.cs b/LiteDB/Document/BsonArray.cs
index 78688a883..c8d3b6e1d 100644
--- a/LiteDB/Document/BsonArray.cs
+++ b/LiteDB/Document/BsonArray.cs
@@ -21,7 +21,7 @@ public BsonArray(List<BsonValue> array)
             this.AddRange(array);
         }
 
-        public BsonArray(BsonValue[] array)
+        public BsonArray(params BsonValue[] array)
             : this()
         {
             if (array == null) throw new ArgumentNullException(nameof(array));