diff --git a/source/scriptinterface/ScriptInterface.h b/source/scriptinterface/ScriptInterface.h
index d91889a0f5..3924d10a76 100644
--- a/source/scriptinterface/ScriptInterface.h
+++ b/source/scriptinterface/ScriptInterface.h
@@ -508,6 +508,12 @@ inline void ScriptInterface::AssignOrToJSVal<JS::PersistentRootedValue>(JSContex
 	handle.set(a);
 }
 
+template<>
+inline void ScriptInterface::AssignOrToJSVal<JS::Heap<JS::Value> >(JSContext* UNUSED(cx), JS::MutableHandleValue handle, const JS::Heap<JS::Value>& a)
+{
+	handle.set(a);
+}
+
 template<>
 inline void ScriptInterface::AssignOrToJSVal<JS::RootedValue>(JSContext* UNUSED(cx), JS::MutableHandleValue handle, const JS::RootedValue& a)
 {