1 files changed, 1 insertions, 1 deletions
diff --git a/runtest b/runtest
index 692182f..15fbea2 100755
--- a/runtest
+++ b/runtest
@@ -87,7 +87,7 @@ verbose=0
 debug=""
 for a in "$@" ; do
   case $a in
-      -v|--v|-verb*|--verb*)    verbose=`expr $verbose + 1`;;
+      -v|--v|-verb*|--verb*)    verbose=$((verbose + 1)) ;;
       -D0|--D0)       debug="-D 0" ;;
       -D1|--D1)       debug="-D 1" ;;
   esac