diff --git a/p4src/actions_delta_checksum.p4 b/p4src/actions_delta_checksum.p4
index 31a0261..8e2597c 100644
--- a/p4src/actions_delta_checksum.p4
+++ b/p4src/actions_delta_checksum.p4
@@ -68,23 +68,8 @@ action delta_udp_from_v4_to_v6()
     hdr.udp.checksum = (bit<16>) tmp;
 }
 
-action delta_udp_from_v6_to_v4()
-{
-    delta_prepare();
+#define delta_udp_from_v6_to_v4 delta_prepare (); tmp17 = (bit<17>) hdr.udp.checksum + (bit<17>) meta.v4sum; if (tmp17[16:16] == 1) { tmp17 = tmp17 + 1; tmp17[16:16] = 0; } tmp17 = tmp17 + (bit<17>) (0xffff - meta.v6sum); if (tmp17[16:16] == 1) { tmp17 = tmp17 + 1; tmp17[16:16] = 0; }  hdr.udp.checksum = (bit<16>) tmp17;
 
-    bit<17> tmp = (bit<17>) hdr.udp.checksum + (bit<17>) meta.v4sum;
-    if (tmp[16:16] == 1) {
-        tmp = tmp + 1;
-        tmp[16:16] = 0;
-    }
-    // tmp = tmp + (bit<17>) (0xffff - meta.v6sum);
-    // if (tmp[16:16] == 1) {
-    //     tmp = tmp + 1;
-    //     tmp[16:16] = 0;
-    // }
-
-    hdr.udp.checksum = (bit<16>) tmp;
-}
 
 action delta_tcp_from_v4_to_v6()
 {
diff --git a/p4src/minip4_solution.p4 b/p4src/minip4_solution.p4
index 3ccbce3..5c3a16a 100644
--- a/p4src/minip4_solution.p4
+++ b/p4src/minip4_solution.p4
@@ -143,9 +143,11 @@ control RealMain(
                 }
 
                 if(hdr.udp.isValid()) {
+                    bit<17> tmp17 = 0;
                     //delta_prepare();
-                    delta_udp_from_v6_to_v4();
+                    //delta_udp_from_v6_to_v4();
                     //stupid();
+                    delta_udp_from_v6_to_v4
                 }
                 // if(hdr.tcp.isValid()) {
                 //     #ifdef USE_NICO_DELTA_CHECKSUM