diff --git a/rfbplayer/rfbplayer.cxx b/rfbplayer/rfbplayer.cxx
index 8efce38..94a5b5d 100644
--- a/rfbplayer/rfbplayer.cxx
+++ b/rfbplayer/rfbplayer.cxx
@@ -408,7 +408,7 @@
     case ID_HELP_COMMANDLINESWITCHES:
       {
         InfoDialog usageDialog(usage_msg);
-        usageDialog.showDialog();
+        usageDialog.showDialog(getMainHandle());
       }
       break;
     case ID_ABOUT: