diff --git a/salt/common/tools/sbin/soup b/salt/common/tools/sbin/soup
index 9d4d54a93..1b3d88c74 100755
--- a/salt/common/tools/sbin/soup
+++ b/salt/common/tools/sbin/soup
@@ -189,7 +189,7 @@ rc2_to_rc3() {
 space_check() {
   # Check to see if there is enough space
   CURRENTSPACE=$(df -BG / | grep -v Avail | awk '{print $4}' | sed 's/.$//')
-  if [ "$CURRENTSPACE" -lt 10 ]; then
+  if [ "$CURRENTSPACE" -lt "10" ]; then
       read -rsn1 -p"You are low on disk space. Upgrade will try and clean up space. Press any key to continue or Ctrl+c to exit";
       clean_dockers
   else