diff --git a/cleanup.sh b/cleanup.sh
index 72d5f41..8a5e4c9 100644
--- a/cleanup.sh
+++ b/cleanup.sh
@@ -10,5 +10,5 @@ fi
 _tmp_file=$(ls "${INPUT_PROJECTBASEDIR}/" | head -1)
 PERM=$(stat -c "%u:%g" "${INPUT_PROJECTBASEDIR}/$_tmp_file")
 
-chown -R $PERM "${INPUT_PROJECTBASEDIR}/.scannerwork/"
+chown -R "$PERM" "${INPUT_PROJECTBASEDIR}/.scannerwork/"