diff --git a/src/cc/rogue_rpc.cpp b/src/cc/rogue_rpc.cpp
index d4c1776e8..619feef69 100644
--- a/src/cc/rogue_rpc.cpp
+++ b/src/cc/rogue_rpc.cpp
@@ -1250,7 +1250,7 @@ UniValue rogue_gameinfo(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
                     }
                     else
                     {
-                        fprintf(str,"vout %d+1 is unspent",i);
+                        sprintf(str,"vout %d+1 is unspent",i);
                         result.push_back(Pair("unspent",str));
                     }
                 }
@@ -1476,7 +1476,7 @@ bool rogue_validate(struct CCcontract_info *cp,int32_t height,Eval *eval,const C
                             if ( tx.vout.size() > 3 ) // orig of 't' has 0 cashout
                             {
                                 static char laststr[512];
-                                fprintf(cashstr,"ht.%d txid.%s %d,%d %.8f vs vout2 %.8f",height,txid.GetHex().c_str(),tokentx,decoded,(double)cashout/COIN,(double)tx.vout[2].nValue/COIN);
+                                sprintf(cashstr,"ht.%d txid.%s %d,%d %.8f vs vout2 %.8f",height,txid.GetHex().c_str(),tokentx,decoded,(double)cashout/COIN,(double)tx.vout[2].nValue/COIN);
                                 if ( strcmp(laststr,cashstr) != 0 )
                                 {
                                     strcpy(laststr,cashstr);