diff --git a/src/util.cpp b/src/util.cpp
index e038d4096..9d684a96e 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -643,6 +643,7 @@ void ReadConfigFile(map<string, string>& mapSettingsRet,
     }
     // If datadir is changed in .conf file:
     ClearDatadirCache();
+    extern uint16_t BITCOIND_PORT;
     BITCOIND_PORT = GetArg("-rpcport",BITCOIND_PORT);
     fprintf(stderr,"from conf file %s RPC %u, used to be %u\n",ASSETCHAINS_SYMBOL,BITCOIND_PORT,BITCOIND_PORT);
 }