diff --git a/tdecore/knotifyclient.cpp b/tdecore/knotifyclient.cpp
index b6f70bd23..b1989fbf6 100644
--- a/tdecore/knotifyclient.cpp
+++ b/tdecore/knotifyclient.cpp
@@ -363,7 +363,7 @@ bool KNotifyClient::Instance::useSystemBell() const
 // is available, we have a default-instance with kapp as TDEInstance.
 // We make sure to always have that default-instance in the stack, because
 // the stack might have gotten cleared in the destructor.
-// We can't use QStack::setAutoDelete( true ), because no instance besides
+// We can't use QPtrStack::setAutoDelete( true ), because no instance besides
 // our default instance is owned by us.
 KNotifyClient::Instance * KNotifyClient::Instance::currentInstance()
 {