diff --git a/libraries/liblmdb/lmdb.h b/libraries/liblmdb/lmdb.h
index afcfe889c7..587a44eaf4 100644
--- a/libraries/liblmdb/lmdb.h
+++ b/libraries/liblmdb/lmdb.h
@@ -176,6 +176,7 @@ typedef	mode_t	mdb_mode_t;
 
 #ifdef MDB_VL32
 typedef uint64_t	mdb_size_t;
+#define mdb_env_create(env)	mdb_env_create_vl32(env)	/**< Prevent mixing with non-VL32 builds */
 #else
 typedef size_t	mdb_size_t;
 #endif