diff --git a/debian/scripts/koha-plack b/debian/scripts/koha-plack
index f31dadbabd..1677ee0ec1 100755
--- a/debian/scripts/koha-plack
+++ b/debian/scripts/koha-plack
@@ -121,7 +121,7 @@ start_plack()
             log_end_msg 1
         fi
         # Go back to the original dir
-        cd $current_dir
+        cd "$current_dir"
 
     else
         log_daemon_msg "Error: Plack already running for ${instancename}"