diff --git a/graphics/nxmu/nx_start.c b/graphics/nxmu/nx_start.c
index 5c7435880e..757b418d7e 100644
--- a/graphics/nxmu/nx_start.c
+++ b/graphics/nxmu/nx_start.c
@@ -190,8 +190,9 @@ int nx_start(void)
                               CONFIG_NXSTART_SERVERSTACK, nx_server, NULL);
       if (server < 0)
         {
-          gerr("ERROR: Failed to create nx_server kernel thread: %d\n", ret);
-          return ret;
+          gerr("ERROR: Failed to create nx_server kernel thread: %d\n",
+               (int)server);
+          return (int)server;
         }
 
       g_nxserver_started = true;