diff --git a/src/core/netif.c b/src/core/netif.c
index 51044470..381690bb 100644
--- a/src/core/netif.c
+++ b/src/core/netif.c
@@ -931,7 +931,9 @@ netif_loop_output(struct netif *netif, struct pbuf *p)
      netif_poll(). */
 
   /* let last point to the last pbuf in chain r */
-  for (last = r; last->next != NULL; last = last->next);
+  for (last = r; last->next != NULL; last = last->next) {
+    /* nothing to do here, just get to the last pbuf */
+  }
 
   SYS_ARCH_PROTECT(lev);
   if (netif->loop_first != NULL) {