diff --git a/.github/actions/akamai-purge-osx/action.yml b/.github/actions/akamai-purge-osx/action.yml
index be6add9cb..4182be747 100644
--- a/.github/actions/akamai-purge-osx/action.yml
+++ b/.github/actions/akamai-purge-osx/action.yml
@@ -38,7 +38,7 @@ runs:
               batch=${urls:$offset:$length}
               echo $batch
               offset=$((offset + length))
-              length=$((end - start))
+              length=$(($end - $offset))
             else
               length=$new_length
             fi