diff --git a/basilisk/basilisk_swap.c b/basilisk/basilisk_swap.c
index f1ec87c1b..7e9965d83 100755
--- a/basilisk/basilisk_swap.c
+++ b/basilisk/basilisk_swap.c
@@ -239,6 +239,7 @@ int32_t basilisk_rawtx_sign(struct supernet_info *myinfo,int32_t height,struct b
         V[0].userdatalen = userdatalen;
         init_hexbytes_noT(hexstr,userdata,userdatalen);
         jaddstr(item,"userdata",hexstr);
+        jaddnum(txobj,"version",4);
     }
     if ( bits256_nonz(rawtx->actualtxid) != 0 )
         jaddbits256(item,"txid",rawtx->actualtxid);