diff --git a/src/epanet.c b/src/epanet.c
index bbbfb620..10bb4859 100644
--- a/src/epanet.c
+++ b/src/epanet.c
@@ -4907,7 +4907,7 @@ int DLLEXPORT EN_setcurvetype(EN_Project p, int index, int type)
     Network *net = &p->network;
     if (!p->Openflag) return 102;
     if (index < 1 || index > net->Ncurves) return 206;
-    if (type < 0 || type > EN_GENERIC_CURVE) return 251;
+    if (type < 0 || type > EN_VALVE_CURVE) return 251;
     net->Curve[index].Type = type;
     return 0;
 }
diff --git a/tests/test_valve.cpp b/tests/test_valve.cpp
index 925ebea6..d024007c 100644
--- a/tests/test_valve.cpp
+++ b/tests/test_valve.cpp
@@ -28,7 +28,7 @@ BOOST_FIXTURE_TEST_CASE(test_PCV_valve, FixtureOpenClose)
     double x[] = { 0.0, 25., 50., 75., 100. };
     double y[] = {0.0, 8.9, 18.4, 40.6, 100.0};
     double v;
-    int linkIndex, curveIndex;
+    int linkIndex, curveIndex, curveType;
 
     // Make steady state run
     error = EN_settimeparam(ph, EN_DURATION, 0);
@@ -50,6 +50,11 @@ BOOST_FIXTURE_TEST_CASE(test_PCV_valve, FixtureOpenClose)
     BOOST_REQUIRE(error == 0);
     error = EN_setcurve(ph, curveIndex, x, y, npts);
     BOOST_REQUIRE(error == 0);
+    error = EN_setcurvetype(ph, curveIndex, EN_VALVE_CURVE);
+    BOOST_REQUIRE(error == 0);
+    error = EN_getcurvetype(ph, curveIndex, &curveType);
+    BOOST_REQUIRE(error == 0);
+    BOOST_REQUIRE(curveType == EN_VALVE_CURVE);
 
     // Assign curve & initial setting to PCV
     error = EN_setlinkvalue(ph, linkIndex, EN_PCV_CURVE, curveIndex);