diff --git a/contrib/screen b/contrib/screen
index 53a0fdeb..2118e2f5 100644
--- a/contrib/screen
+++ b/contrib/screen
@@ -43,8 +43,8 @@ _screen()
             return 0
             ;;
         -s)
-            # shells
-            COMPREPLY=( $( grep ^${cur:-[^#]} /etc/shells ) )
+            _shells
+            return 0
             ;;
         -c)
             _filedir