diff --git a/src/rpcnet.cpp b/src/rpcnet.cpp
index 27650aa17..233aeb2c8 100644
--- a/src/rpcnet.cpp
+++ b/src/rpcnet.cpp
@@ -196,6 +196,7 @@ int32_t komodo_longestchain()
     }
     if ( num > (n >> 1) )
     {
+        extern char ASSETCHAINS_SYMBOL[];
         if ( height != KOMODO_LONGESTCHAIN )
             fprintf(stderr,"set %s KOMODO_LONGESTCHAIN <- %d\n",ASSETCHAINS_SYMBOL,height);
         KOMODO_LONGESTCHAIN = height;