diff --git a/bash_completion b/bash_completion
index ca20097b..87eae16b 100644
--- a/bash_completion
+++ b/bash_completion
@@ -1,6 +1,6 @@
 #   bash_completion - some programmable completion functions for bash 2.05a
 #
-#   $Id: bash_completion,v 1.343 2002/06/02 22:19:38 ianmacd Exp $
+#   $Id: bash_completion,v 1.344 2002/06/04 05:27:03 ianmacd Exp $
 #
 #   Copyright (C) Ian Macdonald <ian@caliban.org>
 #
@@ -1943,7 +1943,7 @@ _tar()
 		tar=$( echo "$COMP_LINE" | \
 			sed -e 's/^.* \([^ ]*'$regex'\) .*$/\1/' )
 		# devise how to untar and list it
-		untar=t$( echo ${COMP_WORDS[1]} | tr -cd Izjyf )
+		untar=t${COMP_WORDS[1]//[^Izjyf]/}
 
 		COMPREPLY=( $( compgen -W "$( tar $untar $tar 2>/dev/null )" \
 				-- "$cur" ) )