diff --git a/src/core/pbuf.c b/src/core/pbuf.c
index 05c6f560..b42bac14 100644
--- a/src/core/pbuf.c
+++ b/src/core/pbuf.c
@@ -300,7 +300,7 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
       r = q;
     }
     /* end of chain */
-    //r->next = NULL;
+    /*r->next = NULL;*/
 
     break;
   case PBUF_RAM: