diff --git a/Generator/CodeWriter/Class.cs b/Generator/CodeWriter/Class.cs
index 1077a63..1c0790f 100644
--- a/Generator/CodeWriter/Class.cs
+++ b/Generator/CodeWriter/Class.cs
@@ -430,7 +430,8 @@ private void Detect_InterfaceReturn( List<Argument> argList, List<Argument> call
             ReturnVar = "interface_pointer";
             ReturnType = ReturnType.Substring( 1 ).Trim( '*', ' ' );
 
-            AfterLines.Add( $"return new {ReturnType}( steamworks, interface_pointer );" );
+			AfterLines.Add( $"if ( interface_pointer == IntPtr.Zero ) throw new System.Exception( $\"Error getting interface {{pchVersion}}\");" );
+			AfterLines.Add( $"return new {ReturnType}( steamworks, interface_pointer );" );
         }
 
         private void Detect_VectorReturn( List<Argument> argList, List<Argument> callArgs )