diff --git a/xCAT-server/lib/xcat/plugins/FIP.pm b/xCAT-server/lib/xcat/plugins/FIP.pm
index 7e52fd6f4..9b4efbe59 100644
--- a/xCAT-server/lib/xcat/plugins/FIP.pm
+++ b/xCAT-server/lib/xcat/plugins/FIP.pm
@@ -481,7 +481,7 @@ sub swapnodes
 
 #----------------------------------------------------------------------------
 
-=head3  swapnodes_usage 
+=head3  swapnodes_usage
 
         Arguments:
         Returns: