diff --git a/p4src/actions_delta_checksum.p4 b/p4src/actions_delta_checksum.p4
index c258d18..026662b 100644
--- a/p4src/actions_delta_checksum.p4
+++ b/p4src/actions_delta_checksum.p4
@@ -53,8 +53,8 @@ action delta_prepare()
 action delta_udp_from_v4_to_v6()
 {
     delta_prepare();
-    hdr.udp.checksum = meta.v6sum;
-//    hdr.udp.checksum = meta.v4sum;
+//    hdr.udp.checksum = meta.v6sum;
+    hdr.udp.checksum = meta.v4sum;
 //    hdr.udp.checksum = hdr.udp.checksum + meta.v6sum - meta.v4sum;
 }