diff --git a/scripts/scripts-library.sh b/scripts/scripts-library.sh
index 8ee74412c8..1514070740 100755
--- a/scripts/scripts-library.sh
+++ b/scripts/scripts-library.sh
@@ -48,7 +48,7 @@ function successerator {
   # Set the initial return value to failure.
   false
   while [ $? -ne 0 -a ${RETRY} -lt ${MAX_RETRIES} ];do
-    ((RETRY++))
+    $((RETRY++))
     if [ ${RETRY} -gt 1 ];then
       $@ -vvvv
     else