diff --git a/p4src/checksums.p4 b/p4src/checksums.p4
index ce2da97..26ee294 100644
--- a/p4src/checksums.p4
+++ b/p4src/checksums.p4
@@ -74,7 +74,7 @@ control MyComputeChecksum(inout headers  hdr, inout metadata meta) {
             {
                 hdr.ipv4.version,
 	            hdr.ipv4.ihl,
-                hdr.ipv4.dscp,
+                hdr.ipv4.diff_serv,
                 hdr.ipv4.ecn,
                 hdr.ipv4.totalLen,
                 hdr.ipv4.identification,
@@ -82,8 +82,8 @@ control MyComputeChecksum(inout headers  hdr, inout metadata meta) {
                 hdr.ipv4.fragOffset,
                 hdr.ipv4.ttl,
                 hdr.ipv4.protocol,
-                hdr.ipv4.srcAddr,
-                hdr.ipv4.dstAddr
+                hdr.ipv4.src_addr;
+                hdr.ipv4.dst_addr;
             },
             hdr.ipv4.hdrChecksum,
             HashAlgorithm.csum16);