diff --git a/ksim/ksim.cpp b/ksim/ksim.cpp
index 1f7ca58..4d70777 100644
--- a/ksim/ksim.cpp
+++ b/ksim/ksim.cpp
@@ -110,7 +110,7 @@ void KSim::PanelExtension::about()
 
 void KSim::PanelExtension::help()
 {
-  kapp->invokeHelp( TQString(), "ksim" );
+  kapp->invokeHelp(TQString::null, "ksim");
 }
 
 void KSim::PanelExtension::preferences()
diff --git a/ksim/ksimpref.cpp b/ksim/ksimpref.cpp
index 871f3b0..52fe424 100644
--- a/ksim/ksimpref.cpp
+++ b/ksim/ksimpref.cpp
@@ -44,6 +44,7 @@ KSim::ConfigDialog::ConfigDialog(KSim::Config *config,
   resize(466, 363);
   setShowIconsInTreeList(true);
   setRootIsDecorated(false);
+  setHelp(TQString::null, "ksim");
 
   m_config = config;