diff --git a/xCAT-server/lib/xcat/plugins/confluent.pm b/xCAT-server/lib/xcat/plugins/confluent.pm
index 0b0602acc..8c2baded0 100644
--- a/xCAT-server/lib/xcat/plugins/confluent.pm
+++ b/xCAT-server/lib/xcat/plugins/confluent.pm
@@ -20,7 +20,7 @@ my $usage_string =
   "  makeconfluentcfg [-d|--delete] noderange
   makeconfluentcf [-l|--local]
   makeconfluentcf [-c|--confluent]
-  makeconfluentcf 
+  makeconfluentcf
   makeconfluentcf -h|--help
   makeconfluentcf -v|--version
     -c|--confluent   Configure confluent only on the host.