diff --git a/vncviewer/OptionsDialog.cxx b/vncviewer/OptionsDialog.cxx
index 73ff551..20465b5 100644
--- a/vncviewer/OptionsDialog.cxx
+++ b/vncviewer/OptionsDialog.cxx
@@ -511,7 +511,7 @@
 
   compressionInput = new Fl_Int_Input(tx + INDENT, ty,
                                       INPUT_HEIGHT, INPUT_HEIGHT,
-                                      _("level (1=fast, 9=best)"));
+                                      _("level (1=fast, 6=best [4-6 are rarely useful])"));
   compressionInput->align(FL_ALIGN_RIGHT);
   ty += INPUT_HEIGHT + INNER_MARGIN;