diff --git a/components/lwip/core/ipv4/autoip.c b/components/lwip/core/ipv4/autoip.c
index f27d28aa24..e18b8e23c0 100644
--- a/components/lwip/core/ipv4/autoip.c
+++ b/components/lwip/core/ipv4/autoip.c
@@ -383,6 +383,8 @@ autoip_stop(struct netif *netif)
     if (ip4_addr_islinklocal(netif_ip4_addr(netif))) {
       netif_set_addr(netif, IP4_ADDR_ANY, IP4_ADDR_ANY, IP4_ADDR_ANY);
     }
+    mem_free(netif->autoip);
+    netif->autoip = NULL;
   }
   return ERR_OK;
 }