diff --git a/p4src/checksum_diff.p4 b/p4src/checksum_diff.p4
index ce4987d..12a9d9c 100644
--- a/p4src/checksum_diff.p4
+++ b/p4src/checksum_diff.p4
@@ -138,6 +138,9 @@ control MyIngress(inout headers hdr,
     inout standard_metadata_t standard_metadata) {
 
 
+    #include "nat64_generic.p4"
+
+
 	/********************** APPLYING TABLES ***********************************/
     apply {
         if(hdr.ipv6.isValid()) {