diff --git a/src/corelib/kernel/qobject_p_p.h b/src/corelib/kernel/qobject_p_p.h
index 3519e4dd133..2277af04976 100644
--- a/src/corelib/kernel/qobject_p_p.h
+++ b/src/corelib/kernel/qobject_p_p.h
@@ -245,7 +245,7 @@ struct QObjectPrivate::Sender
             s = s->previous;
         }
     }
-    Sender *previous;
+    Sender *previous = nullptr;
     QObject *receiver;
     QObject *sender;
     int signal;