diff --git a/110-Cleanup.sh b/110-Cleanup.sh
index 6f08e60..52ee585 100644
--- a/110-Cleanup.sh
+++ b/110-Cleanup.sh
@@ -8,14 +8,14 @@ source "$SCRIPTDIR/common/load-defaults.sh"
 
 printf "$COL_LIGHT_BLUE" "* Cleaning up system"
 prespace=$(get_system_used_space)
-prespacewords=`human_readable_bytes "$prespace"`
+prespacewords=$(human_readable_bytes "$prespace")
 printf "$COL_LIGHT_BLUE" "* Current used space is $prespacewords"
 
 pkgmgr_clean
 
 postspace=$(get_system_used_space)
 printf "$COL_LIGHT_BLUE" "* Current used space is now $postspace"
-postspacewords=`human_readable_bytes "$prespace"`
+postspacewords=$(human_readable_bytes "$prespace")
 printf "$COL_LIGHT_BLUE" "* Current used space is now $postspacewords"
 
 spacesavedbytes=`expr $postspace - $prespace`