--- mlmmj-1.2.12-RC3-vanilla/src/mlmmj-make-ml.sh.in	2005-10-02 16:54:33.000000000 +0200
+++ mlmmj-1.2.12-RC3/src/mlmmj-make-ml.sh.in	2006-09-26 10:16:47.000000000 +0200
@@ -46,7 +46,7 @@
 	exit 1
 esac
 done
-let SHIFTVAL=$OPTIND-1
+SHIFTVAL=$(( $OPTIND - 1 ))
 shift $SHIFTVAL
 
 if [ -z "$SPOOLDIR" ]; then