diff --git a/p4src/checksum_bmv2.p4 b/p4src/checksum_bmv2.p4
index 61e44bb..6f1039b 100644
--- a/p4src/checksum_bmv2.p4
+++ b/p4src/checksum_bmv2.p4
@@ -69,7 +69,7 @@ update_checksum(meta.chk_ipv4 == 1,
         hdr.ipv4.src_addr,
         hdr.ipv4.dst_addr
     },
-    hdr.ipv4.hdrChecksum,
+    hdr.ipv4.checksum,
     HashAlgorithm.csum16
 );