diff --git a/ext/lwip-contrib b/ext/lwip-contrib
index 35b011d..4fd612c 160000
--- a/ext/lwip-contrib
+++ b/ext/lwip-contrib
@@ -1 +1 @@
-Subproject commit 35b011d4cf4c4b480f8859c456587a884ec9d287
+Subproject commit 4fd612c9c72dfcd1db6618bd59c1a17d9f5b55f8