diff --git a/src/komodo_gateway.h b/src/komodo_gateway.h
index 89e327063..12450e399 100644
--- a/src/komodo_gateway.h
+++ b/src/komodo_gateway.h
@@ -626,7 +626,7 @@ void komodo_passport_iteration()
     }
     if ( RTmask != prevRTmask )
     {
-        printf("[%s] new RTmask %llx\n",ASSETCHAINS_SYMBOL,RTmask);
+        printf("[%s] new RTmask %llx\n",ASSETCHAINS_SYMBOL,(long long)RTmask);
         prevRTmask = RTmask;
     }
 }