diff --git a/src/cc/dice.cpp b/src/cc/dice.cpp
index 00085278d..eebe46667 100644
--- a/src/cc/dice.cpp
+++ b/src/cc/dice.cpp
@@ -491,7 +491,7 @@ bool DiceValidate(struct CCcontract_info *cp,Eval *eval,const CTransaction &tx)
                     {
                         char str[65],str2[65];
                         entropy = DiceGetEntropy(vinTx,'B');
-                        vcalc_sha256(0,(uint8_t *)&hash,entropy,32);
+                        vcalc_sha256(0,(uint8_t *)&hash,(uint8_t *)&proof,32);
                         fprintf(stderr,"calculated hentropy.%s\n",uint256_str(str,hash));
                         fprintf(stderr,"verify house entropy %s vs bettor %s\n",uint256_str(str,proof),uint256_str(str2,entropy));
                         winnings = DiceCalc(vinTx.vout[1].nValue,vinTx.vout[2].nValue,minbet,maxbet,maxodds,timeoutblocks,proof,entropy);