diff --git a/hecl/extern/boo b/hecl/extern/boo
index befa1a11a..d9abcb8cf 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit befa1a11a29e279408a7e97478a565078e499e70
+Subproject commit d9abcb8cf54eab7ecb1a326435a53a6d438d18ef