diff --git a/xCAT-server/share/xcat/tools/detect_dhcpd b/xCAT-server/share/xcat/tools/detect_dhcpd
index d696a66eb..d7de75c55 100755
--- a/xCAT-server/share/xcat/tools/detect_dhcpd
+++ b/xCAT-server/share/xcat/tools/detect_dhcpd
@@ -313,3 +313,5 @@ sub kill_child {
     #print "try to kill $cpid\n";
   }
 }
+
+