--- a/ipc/glue/WindowsMessageLoop.cpp
+++ b/ipc/glue/WindowsMessageLoop.cpp
@@ -226,17 +226,17 @@ ScheduleDeferredMessageRun()
 static void
 DumpNeuteredMessage(HWND hwnd, UINT uMsg)
 {
 #ifdef DEBUG
   nsAutoCString log("Received \"nonqueued\" ");
   // classify messages
   if (uMsg < WM_USER) {
     int idx = 0;
-    while (mozilla::widget::gAllEvents[idx].mId != (long)uMsg &&
+    while (mozilla::widget::gAllEvents[idx].mId != uMsg &&
            mozilla::widget::gAllEvents[idx].mStr != nullptr) {
       idx++;
     }
     if (mozilla::widget::gAllEvents[idx].mStr) {
       log.AppendPrintf("ui message \"%s\"", mozilla::widget::gAllEvents[idx].mStr);
     } else {
       log.AppendPrintf("ui message (0x%X)", uMsg);
     }