diff --git a/obs/window-basic-main.cpp b/obs/window-basic-main.cpp
index 35941c288..b4b28c429 100644
--- a/obs/window-basic-main.cpp
+++ b/obs/window-basic-main.cpp
@@ -57,6 +57,7 @@ using namespace std;
 
 Q_DECLARE_METATYPE(OBSScene);
 Q_DECLARE_METATYPE(OBSSceneItem);
+Q_DECLARE_METATYPE(OBSSource);
 Q_DECLARE_METATYPE(obs_order_movement);
 
 static void AddExtraModulePaths()