diff --git a/xCAT-server/lib/perl/xCAT/RShellAPI.pm b/xCAT-server/lib/perl/xCAT/RShellAPI.pm
index 3d9aae5ac..bcc6ebd32 100644
--- a/xCAT-server/lib/perl/xCAT/RShellAPI.pm
+++ b/xCAT-server/lib/perl/xCAT/RShellAPI.pm
@@ -69,7 +69,7 @@ sub remote_shell_command {
         run_remote_shell_api
 
         This routine tried ssh then telnet to logon to a node and
-        run a sequence of commands. 
+        run a sequence of commands.
         Arguments:
         	$node - node name
         	$user - user login name