diff --git a/sys/kern/genassym.sh b/sys/kern/genassym.sh
--- a/sys/kern/genassym.sh
+++ b/sys/kern/genassym.sh
@@ -57,7 +57,7 @@
 	*)	usage;;
 	esac
 done
-shift $(($OPTIND - 1))
+shift $((OPTIND - 1))
 case $# in
 1)	;;
 *)	usage;;
@@ -65,8 +65,8 @@
 
 if [ "$use_outfile" = "yes" ]
 then
-	work $1  3>"$outfile" >&3 3>&-
+	work "$1"  3>"$outfile" >&3 3>&-
 else
-	work $1
+	work "$1"
 fi