diff --git a/xCAT-server/sbin/xcatd b/xCAT-server/sbin/xcatd
index c9cebe0b2..444927ce3 100755
--- a/xCAT-server/sbin/xcatd
+++ b/xCAT-server/sbin/xcatd
@@ -1988,7 +1988,7 @@ sub relay_fds { #Relays file descriptors from pipes to children to the SSL socke
           print "Aborting...";
          foreach (keys %plugin_children) {
             print "Sending INT to $_\n";
-            kill 2, $_;
+            kill 15, $_;
          }
          foreach my $cin ($fds->handles) {
             print $cin "die\n";