diff --git a/tools/sdk/lib/liblwip2-1460-feat.a b/tools/sdk/lib/liblwip2-1460-feat.a
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diff --git a/tools/sdk/lib/liblwip2-1460.a b/tools/sdk/lib/liblwip2-1460.a
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diff --git a/tools/sdk/lib/liblwip2-536-feat.a b/tools/sdk/lib/liblwip2-536-feat.a
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diff --git a/tools/sdk/lib/liblwip2-536.a b/tools/sdk/lib/liblwip2-536.a
index 93d6c99577..5cfa68c17d 100644
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diff --git a/tools/sdk/lib/liblwip6-1460-feat.a b/tools/sdk/lib/liblwip6-1460-feat.a
index f278e75f93..e4be481056 100644
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diff --git a/tools/sdk/lib/liblwip6-536-feat.a b/tools/sdk/lib/liblwip6-536-feat.a
index 56968ba786..69c573e7f1 100644
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diff --git a/tools/sdk/lwip2/builder b/tools/sdk/lwip2/builder
index b543b1f1f4..92add5010f 160000
--- a/tools/sdk/lwip2/builder
+++ b/tools/sdk/lwip2/builder
@@ -1 +1 @@
-Subproject commit b543b1f1f4aff4787693da71b6ea91ca23e9b01f
+Subproject commit 92add5010fc329cbfbbcb1ce713108451cf9fc8c
diff --git a/tools/sdk/lwip2/include/lwip-git-hash.h b/tools/sdk/lwip2/include/lwip-git-hash.h
index 0fb03f0df1..9d70652d2d 100644
--- a/tools/sdk/lwip2/include/lwip-git-hash.h
+++ b/tools/sdk/lwip2/include/lwip-git-hash.h
@@ -1,5 +1,5 @@
 // generated by makefiles/make-lwip2-hash
 #ifndef LWIP_HASH_H
 #define LWIP_HASH_H
-#define LWIP_HASH_STR "STABLE-2_1_2_RELEASE/glue:1.2-29-gb543b1f"
+#define LWIP_HASH_STR "STABLE-2_1_2_RELEASE/glue:1.2-31-gac862f1"
 #endif // LWIP_HASH_H
diff --git a/tools/sdk/lwip2/include/lwip/priv/tcp_priv.h b/tools/sdk/lwip2/include/lwip/priv/tcp_priv.h
index 72f9126d46..394d9633af 100644
--- a/tools/sdk/lwip2/include/lwip/priv/tcp_priv.h
+++ b/tools/sdk/lwip2/include/lwip/priv/tcp_priv.h
@@ -357,7 +357,7 @@ extern struct tcp_pcb ** const tcp_pcb_lists[NUM_TCP_PCB_LISTS];
 #if TCP_DEBUG_PCB_LISTS
 #define TCP_REG(pcbs, npcb) do {\
                             struct tcp_pcb *tcp_tmp_pcb; \
-                            LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %"U16_F"\n", (void *)(npcb), (npcb)->local_port)); \
+                            LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %" U16_F "\n", (void *)(npcb), (npcb)->local_port)); \
                             for (tcp_tmp_pcb = *(pcbs); \
           tcp_tmp_pcb != NULL; \
         tcp_tmp_pcb = tcp_tmp_pcb->next) { \