diff --git a/src/komodo_bitcoind.h b/src/komodo_bitcoind.h
index 89e79ccbd..372317050 100644
--- a/src/komodo_bitcoind.h
+++ b/src/komodo_bitcoind.h
@@ -1411,7 +1411,7 @@ arith_uint256 komodo_PoWtarget(int32_t *percPoSp,arith_uint256 target,int32_t he
     return(bnTarget);
 }
 
-int32_t komodo_is_PoSblock(int32_t slowflag,int32_t height,CBlock *pblock,arith_uint256 bnTarget)
+int32_t komodo_is_PoSblock(int32_t slowflag,int32_t height,CBlock *pblock,arith_uint256 bnTarget,arith_uint256 bhash)
 {
     CBlockIndex *previndex; char voutaddr[64],destaddr[64]; uint256 txid; uint32_t txtime,prevtime=0; int32_t vout,txn_count,eligible=0,isPoS = 0; uint64_t value; CTxDestination voutaddress;
     if ( ASSETCHAINS_STAKED == 100 && height <= 10 )
@@ -1448,7 +1448,17 @@ int32_t komodo_is_PoSblock(int32_t slowflag,int32_t height,CBlock *pblock,arith_
                     isPoS = 1; // close enough for a pre-filter
                 //else fprintf(stderr,"komodo_is_PoSblock ht.%d (%s) != (%s) or %.8f != %.8f\n",height,destaddr,voutaddr,dstr(value),dstr(pblock->vtx[txn_count-1].vout[0].nValue));
             } else fprintf(stderr,"komodo_is_PoSblock ht.%d couldnt extract voutaddress\n",height);*/
-        } //else return(-1);
+        }
+        if ( slowflag != 0 && isPoS != 0 )
+        {
+            bnTarget = komodo_PoWtarget(&PoSperc,bnTarget,height,ASSETCHAINS_STAKED);
+            if ( bhash < bnTarget )
+            {
+                fprintf(stderr,"ht.%d isPoS but meets PoW diff!\n",height);
+                isPoS = 0;
+            }
+        }
+        //else return(-1);
     }
     //fprintf(stderr,"slow.%d ht.%d isPoS.%d\n",slowflag,height,isPoS);
     return(isPoS);
@@ -1528,7 +1538,7 @@ int32_t komodo_checkPOW(int32_t slowflag,CBlock *pblock,int32_t height)
     }
     if ( ASSETCHAINS_STAKED != 0 && height >= 2 ) // must PoS or have at least 16x better PoW
     {
-        if ( (is_PoSblock= komodo_is_PoSblock(slowflag,height,pblock,bnTarget)) == 0 )
+        if ( (is_PoSblock= komodo_is_PoSblock(slowflag,height,pblock,bnTarget,bhash)) == 0 )
         {
             if ( ASSETCHAINS_STAKED == 100 && height > 100 )  // only PoS allowed! POSTEST64
                 return(-1);