diff --git a/debian/zutils.postrm b/debian/zutils.postrm
index d732840..b9df41b 100755
--- a/debian/zutils.postrm
+++ b/debian/zutils.postrm
@@ -16,7 +16,7 @@ case "${1}" in
 		;;
 
 	*)
-		echo "postrm called with unknown argument \`$1'" >&2
+		echo "postrm called with unknown argument \`${1}'" >&2
 		exit 1
 		;;
 esac