diff --git a/fs/opt/groomer/constraint.sh b/fs/opt/groomer/constraint.sh
index bb34f8e..3b220e2 100644
--- a/fs/opt/groomer/constraint.sh
+++ b/fs/opt/groomer/constraint.sh
@@ -18,7 +18,7 @@ LOGS="${DST}/logs"
 
 # commands
 SUDO='/usr/bin/sudo'
-ID=`/usr/bin/id -u ${USERNAME}`
+ID=`/usr/bin/id -u`
 SYNC='/bin/sync'
 TIMIDITY='/usr/bin/timidity'