diff --git a/bin/psu b/bin/psu
index b337a8c4..18c8ffb4 100755
--- a/bin/psu
+++ b/bin/psu
@@ -19,4 +19,4 @@ case $# in
 	exit 1
 esac
 
-ps $flag | grep "^$user "
+9 ps $flag | grep "^$user "