diff --git a/xCAT-server/lib/xcat/plugins/dhcp.pm b/xCAT-server/lib/xcat/plugins/dhcp.pm
index 1bd2e5357..ec08beded 100644
--- a/xCAT-server/lib/xcat/plugins/dhcp.pm
+++ b/xCAT-server/lib/xcat/plugins/dhcp.pm
@@ -587,7 +587,7 @@ sub addnode
         );
         return;
     }
-    
+
     my @macs = split(/\|/, $ent->{mac});
     my $mace;
     my $deflstaments = $lstatements;