diff --git a/src/komodo_bitcoind.h b/src/komodo_bitcoind.h
index 84b8eaaf1..f146d0d03 100644
--- a/src/komodo_bitcoind.h
+++ b/src/komodo_bitcoind.h
@@ -1433,7 +1433,7 @@ arith_uint256 komodo_adaptivepow_target(int32_t height,arith_uint256 bnTarget,ui
             {
                 bnTarget = easy;
                 fprintf(stderr,"miner overflowed mult.%lld, set to mindiff\n",(long long)mult);
-            } else fprintf(stderr,"miner elapsed %d, adjust by factor of %d\n",diff,(long long)mult);
+            } else fprintf(stderr,"miner elapsed %d, adjust by factor of %lld\n",diff,(long long)mult);
         }
     }
     return(bnTarget);