diff --git a/UI/window-basic-main.cpp b/UI/window-basic-main.cpp
index e57dc40d9..b7860de19 100644
--- a/UI/window-basic-main.cpp
+++ b/UI/window-basic-main.cpp
@@ -2880,7 +2880,7 @@ void OBSBasic::SourceCreated(void *data, calldata_t *params)
 
 	if (obs_scene_from_source(source) != NULL)
 		QMetaObject::invokeMethod(static_cast<OBSBasic*>(data),
-				"AddScene",
+				"AddScene", WaitConnection(),
 				Q_ARG(OBSSource, OBSSource(source)));
 }