diff --git a/contrib/libcxx b/contrib/libcxx
index ae5c11b44e2..3a4c2689ae8 160000
--- a/contrib/libcxx
+++ b/contrib/libcxx
@@ -1 +1 @@
-Subproject commit ae5c11b44e2e66cdb0d0283bc0c1e821e27dcb85
+Subproject commit 3a4c2689ae846c16a3210744f8386f99d5e85d17