diff --git a/components/lwip/core/ipv4/autoip.c b/components/lwip/core/ipv4/autoip.c
index 92f5e22ca..e18b8e23c 100755
--- a/components/lwip/core/ipv4/autoip.c
+++ b/components/lwip/core/ipv4/autoip.c
@@ -384,6 +384,7 @@ autoip_stop(struct netif *netif)
       netif_set_addr(netif, IP4_ADDR_ANY, IP4_ADDR_ANY, IP4_ADDR_ANY);
     }
     mem_free(netif->autoip);
+    netif->autoip = NULL;
   }
   return ERR_OK;
 }