diff --git a/xCAT-server/lib/perl/xCAT/Postage.pm b/xCAT-server/lib/perl/xCAT/Postage.pm
index 6bd9f908e..39e68cd7d 100644
--- a/xCAT-server/lib/perl/xCAT/Postage.pm
+++ b/xCAT-server/lib/perl/xCAT/Postage.pm
@@ -629,6 +629,12 @@ sub makescript
             }
         }
     }
+
+    # touch the /etc/xCATSN when it is a service node
+    if (xCAT::Utils->isSN($node)) {
+        push @scriptd, "touch /etc/xCATSN";
+    }
+
     ###Please do not remove or modify this line of code!!! xcatdsklspost depends on it
     push @scriptd, "# postscripts-start-here\n";