diff --git a/bdwgc-alloc-sys/vendor/bdwgc b/bdwgc-alloc-sys/vendor/bdwgc
index 86bd7c0..20f9bcf 160000
--- a/bdwgc-alloc-sys/vendor/bdwgc
+++ b/bdwgc-alloc-sys/vendor/bdwgc
@@ -1 +1 @@
-Subproject commit 86bd7c0a5a8b6d4ef9021d27c3a1db6ecd75499c
+Subproject commit 20f9bcfd5b4d118b32292a81b2506e2b47d76508