1 files changed, 1 insertions, 1 deletions
diff --git a/src/corelib/thread/qthread_p.h b/src/corelib/thread/qthread_p.h
index 0667a814c3..268891d5e8 100644
--- a/src/corelib/thread/qthread_p.h
+++ b/src/corelib/thread/qthread_p.h
@@ -114,7 +114,7 @@ public:
         int priority = ev.priority;
         if (isEmpty() ||
             last().priority >= priority ||
-            begin() + insertionOffset >= end()) {
+            insertionOffset >= size()) {
             // optimization: we can simply append if the last event in
             // the queue has higher or equal priority
             append(ev);