diff --git a/qml/Helper.qml b/qml/Helper.qml
index 9bb80ece..b121d10c 100644
--- a/qml/Helper.qml
+++ b/qml/Helper.qml
@@ -49,6 +49,7 @@ QtObject {
         }
         if (!DesktopIntegration.appIsDummyPackage(desktopId)) {
             mime["text/x-dde-dock-dnd-appid"] = desktopId
+            mime["text/x-dde-dock-dnd-source"] = "launcher"
         }
         return mime
     }