diff --git a/src/plugins/platforms/xcb/qxcbdrag.cpp b/src/plugins/platforms/xcb/qxcbdrag.cpp
index b6f38d6592e..a60933755be 100644
--- a/src/plugins/platforms/xcb/qxcbdrag.cpp
+++ b/src/plugins/platforms/xcb/qxcbdrag.cpp
@@ -1047,9 +1047,8 @@ void QXcbDrag::handleFinished(const xcb_client_message_event_t *event)
     if (event->window != connection()->qtSelectionOwner())
         return;
 
-    const unsigned long *l = (const unsigned long *)event->data.data32;
-    if (l[0]) {
-        int at = findTransactionByWindow(l[0]);
+    if (xcb_window_t w = event->data.data32[0]) {
+        int at = findTransactionByWindow(w);
         if (at != -1) {
 
             Transaction t = transactions.takeAt(at);