diff --git a/src/Generator/Passes/ConstructorToConversionOperatorPass.cs b/src/Generator/Passes/ConstructorToConversionOperatorPass.cs
index 26e2e511..de32c3e9 100644
--- a/src/Generator/Passes/ConstructorToConversionOperatorPass.cs
+++ b/src/Generator/Passes/ConstructorToConversionOperatorPass.cs
@@ -23,17 +23,18 @@ namespace CppSharp.Passes
                 if (pointerType != null && !pointerType.IsReference)
                     return false;
             }
-            var qualifiedPointee = parameter.Type.SkipPointerRefs();
+            var qualifiedPointee = parameter.Type.GetFinalPointee() ?? parameter.Type;
             Class castFromClass;
+            var castToClass = method.OriginalNamespace as Class;
             if (qualifiedPointee.TryGetClass(out castFromClass))
             {
-                var castToClass = method.OriginalNamespace as Class;
                 if (castToClass == null)
                     return false;
                 if (castFromClass == castToClass)
                     return false;
             }
-
+            if (castToClass != null && castToClass.IsAbstract)
+                return false;
             var operatorKind = method.IsExplicit
                 ? CXXOperatorKind.ExplicitConversion
                 : CXXOperatorKind.Conversion;
diff --git a/tests/CSharpTemp/CSharpTemp.Tests.cs b/tests/CSharpTemp/CSharpTemp.Tests.cs
index a0b395e3..65c72f82 100644
--- a/tests/CSharpTemp/CSharpTemp.Tests.cs
+++ b/tests/CSharpTemp/CSharpTemp.Tests.cs
@@ -21,6 +21,7 @@ public class CSharpTempTests : GeneratorTestFixture
         new InheritsProtectedVirtualFromSecondaryBase().Dispose();
         new InheritanceBuffer().Dispose();
         new HasProtectedVirtual().Dispose();
+        new Proprietor(5).Dispose();
         using (var foo = new Foo())
         {
             var isNoParams = foo.IsNoParams;
diff --git a/tests/CSharpTemp/CSharpTemp.cpp b/tests/CSharpTemp/CSharpTemp.cpp
index 853ab162..68e8024b 100644
--- a/tests/CSharpTemp/CSharpTemp.cpp
+++ b/tests/CSharpTemp/CSharpTemp.cpp
@@ -170,6 +170,18 @@ int AbstractProprietor::parent() const
     return 0;
 }
 
+AbstractProprietor::AbstractProprietor()
+{
+}
+
+AbstractProprietor::AbstractProprietor(int i)
+{
+}
+
+Proprietor::Proprietor(int i) : AbstractProprietor(i)
+{
+}
+
 void Proprietor::setValue(int value)
 {
     m_value = value;
diff --git a/tests/CSharpTemp/CSharpTemp.h b/tests/CSharpTemp/CSharpTemp.h
index ba341a76..468226db 100644
--- a/tests/CSharpTemp/CSharpTemp.h
+++ b/tests/CSharpTemp/CSharpTemp.h
@@ -117,6 +117,8 @@ public:
     virtual int parent() const;
 
 protected:
+    AbstractProprietor();
+    AbstractProprietor(int i);
     int m_value;
     long m_property;
 };
@@ -125,6 +127,7 @@ class DLL_API Proprietor : public AbstractProprietor
 {
 public:
     Proprietor();
+    Proprietor(int i);
     virtual void setValue(int value);
 
     virtual long prop();