diff --git a/clients/oxygen/oxygenclient.cpp b/clients/oxygen/oxygenclient.cpp
index 2d4cec4bca..23f95aa3d6 100644
--- a/clients/oxygen/oxygenclient.cpp
+++ b/clients/oxygen/oxygenclient.cpp
@@ -1725,7 +1725,7 @@ namespace Oxygen
 
             QDrag *drag = new QDrag( widget() );
             QMimeData *groupData = new QMimeData();
-            groupData->setData( tabDragMimeType(), QString().setNum( tabId(clickedIndex) ).toAscii() );
+            groupData->setData( tabDragMimeType(), QByteArray().setNum( (qint64) tabId(clickedIndex) ) );
             drag->setMimeData( groupData );
             _sourceItem = tabIndexAt( _dragPoint );