diff --git a/src/cc/CCinclude.h b/src/cc/CCinclude.h
index 761e64bcd..c12389275 100644
--- a/src/cc/CCinclude.h
+++ b/src/cc/CCinclude.h
@@ -60,7 +60,7 @@ bool GetAddressUnspent(uint160 addressHash, int type,std::vector<std::pair<CAddr
 static const uint256 zeroid;
 bool myGetTransaction(const uint256 &hash, CTransaction &txOut, uint256 &hashBlock);
 int32_t is_hexstr(char *str,int32_t n);
-bool myAddtomempool(CTransaction &tx);
+bool myAddtomempool(const CTransaction &tx);
 //uint64_t myGettxout(uint256 hash,int32_t n);
 bool myIsutxo_spentinmempool(uint256 txid,int32_t vout);
 int32_t myIsutxo_spent(uint256 &spenttxid,uint256 txid,int32_t vout);
diff --git a/src/cc/dice.cpp b/src/cc/dice.cpp
index c2f055d8d..56d69a91e 100644
--- a/src/cc/dice.cpp
+++ b/src/cc/dice.cpp
@@ -100,7 +100,7 @@ struct dicefinish_info
 
 bool mySendrawtransaction(std::string res)
 {
-    CTransaction tx; char str[65];
+    const CTransaction tx; char str[65];
     if ( res.empty() == 0 && res.size() > 64 && is_hexstr((char *)res.c_str(),0) > 64 )
     {
         if ( DecodeHexTx(tx,res) != 0 )
diff --git a/src/main.cpp b/src/main.cpp
index 87e79eafc..2b239dcf3 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1623,7 +1623,7 @@ bool GetAddressUnspent(uint160 addressHash, int type,
     else return(coins.vout[n].nValue);
 }*/
 
-bool myAddtomempool(CTransaction &tx)
+bool myAddtomempool(const CTransaction &tx)
 {
     CValidationState state; CTransaction Ltx; bool fMissingInputs,fOverrideFees = false;
     if ( mempool.lookup(tx.GetHash(),Ltx) == 0 )