diff --git a/lwip/esp_interface.c b/lwip/esp_interface.c
index f67f9dd..77ad177 100644
--- a/lwip/esp_interface.c
+++ b/lwip/esp_interface.c
@@ -164,6 +164,8 @@ void pp_recycle_rx_pbuf(struct pbuf *p)
 
 #define COPY_PP_RX_PBUFS 0
 
+#if TCP_QUEUE_OOSEQ
+
 /* Return the number of ooseq bytes that can be retained given the current
  * size 'n'. */
 size_t ooseq_bytes_limit(struct tcp_pcb *pcb)
@@ -220,6 +222,8 @@ size_t ooseq_pbufs_limit(struct tcp_pcb *pcb)
     return target;
 }
 
+#endif /* TCP_QUEUE_OOSEQ */
+
 /**
  * This function should be called when a packet is ready to be read
  * from the interface. It uses the function low_level_input() that
diff --git a/lwip/lwip b/lwip/lwip
index 16c0f92..74676d4 160000
--- a/lwip/lwip
+++ b/lwip/lwip
@@ -1 +1 @@
-Subproject commit 16c0f928b5d6f557e845d96782cb3fa4e8e549fd
+Subproject commit 74676d46f0bc5ed82515f8e247008b7c45ec6cf6