diff --git a/lmdb-sys/lmdb b/lmdb-sys/lmdb
index 6477ba9..ef6dc46 160000
--- a/lmdb-sys/lmdb
+++ b/lmdb-sys/lmdb
@@ -1 +1 @@
-Subproject commit 6477ba95ca484050a4203051305a31c52aa64896
+Subproject commit ef6dc46199b6e7db4b648f9823d16ad077767507