diff --git a/iguana/dPoW.h b/iguana/dPoW.h
index 121c9753a..c48642cff 100755
--- a/iguana/dPoW.h
+++ b/iguana/dPoW.h
@@ -40,7 +40,7 @@
 #define DPOW_FIFOSIZE 64
 #define DPOW_MAXTX 8192
 #define DPOW_THIRDPARTY_CONFIRMS 0
-#define DPOW_KOMODOCONFIRMS 3
+#define DPOW_KOMODOCONFIRMS 10
 #define DPOW_BTCCONFIRMS 1
 #define DPOW_MAXRELAYS 64
 #define DPOW_MAXSIGLEN 128
diff --git a/iguana/dpow/dpow_fsm.c b/iguana/dpow/dpow_fsm.c
index 4340cace2..52ecdf4f5 100755
--- a/iguana/dpow/dpow_fsm.c
+++ b/iguana/dpow/dpow_fsm.c
@@ -387,6 +387,16 @@ void dpow_statemachinestart(void *ptr)
             printf("new ratification started. abort ht.%d\n",bp->height);
             break;
         }
+        if ( bp->isratify == 0 )
+        {
+            bits256 checkhash;
+            checkhash = dpow_getblockhash(myinfo,bp->srccoin,bp->height);
+            if ( bits256_cmp(checkhash,bp->hashmsg) != 0 )
+            {
+                printf("%s ht.%d %s got reorged to %s, abort notarization\n",bp->srccoin->symbol,bp->height,bits256_str(str,bp->hashmsg),bits256_str(str2,checkhash));
+                bp->state = 0xffffffff;
+            }
+        }
         if ( bp->state != 0xffffffff )
         {
             dpow_send(myinfo,dp,bp,srchash,bp->hashmsg,0,bp->height,(void *)"ping",0);
diff --git a/iguana/dpow/dpow_rpc.c b/iguana/dpow/dpow_rpc.c
index 500202359..0ff16dbcd 100755
--- a/iguana/dpow/dpow_rpc.c
+++ b/iguana/dpow/dpow_rpc.c
@@ -85,6 +85,36 @@ bits256 dpow_getbestblockhash(struct supernet_info *myinfo,struct iguana_info *c
     return(blockhash);
 }
 
+bits256 dpow_getblockhash(struct supernet_info *myinfo,struct iguana_info *coin,int32_t height)
+{
+    char buf[128],*retstr=0; bits256 blockhash;
+    memset(blockhash.bytes,0,sizeof(blockhash));
+    if ( coin->FULLNODE < 0 )
+    {
+        sprintf(buf,"\"%d\"",height);
+        retstr = bitcoind_passthru(coin->symbol,coin->chain->serverport,coin->chain->userpass,"getblockhash",buf);
+        printf("%s ht.%d -> getblockhash.(%s)\n",coin->symbol,height,retstr);
+        usleep(10000);
+    }
+    else if ( coin->FULLNODE > 0 || coin->VALIDATENODE > 0 )
+    {
+        printf("test iguana mode getblockhash\n");
+        retstr = bitcoinrpc_getblockhash(myinfo,coin,0,0,height);
+    }
+    else
+    {
+        return(blockhash);
+    }
+    if ( retstr != 0 )
+    {
+        if ( strlen(retstr) == 64 )
+            decode_hex(blockhash.bytes,32,retstr);
+        free(retstr);
+    }
+    return(blockhash);
+}
+
+
 cJSON *dpow_getblock(struct supernet_info *myinfo,struct iguana_info *coin,bits256 blockhash)
 {
     char buf[128],str[65],*retstr=0; cJSON *json = 0;