diff --git a/win/vncviewer/DesktopWindow.cxx b/win/vncviewer/DesktopWindow.cxx
index 2b1ca39..eac2b6f 100644
--- a/win/vncviewer/DesktopWindow.cxx
+++ b/win/vncviewer/DesktopWindow.cxx
@@ -1268,7 +1268,7 @@
     strCopy(desktopName, name, sizeof(desktopName));
   }
   char *newTitle = new char[strlen(desktopName)+20];
-  sprintf(newTitle, "%s @ %i%%", desktopName, getDesktopScale());
+  sprintf(newTitle, "TightVNC: %.240s @ %i%%", desktopName, getDesktopScale());
   SetWindowText(handle, TStr(newTitle));
   delete [] newTitle;
 }