diff --git a/libraries/liblmdb/lmdb.h b/libraries/liblmdb/lmdb.h
index 9540624..57c3f88 100644
--- a/libraries/liblmdb/lmdb.h
+++ b/libraries/liblmdb/lmdb.h
@@ -138,7 +138,9 @@ extern "C" {
 #endif
 
 #ifdef _MSC_VER
-#define	mode_t	int
+typedef	int	mdb_mode_t;
+#else
+typedef	mode_t	mdb_mode_t;
 #endif
 
 /** @defgroup mdb MDB API
@@ -502,7 +504,7 @@ int  mdb_env_create(MDB_env **env);
 	 *	<li>EAGAIN - the environment was locked by another process.
 	 * </ul>
 	 */
-int  mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode);
+int  mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode);
 
 	/** @brief Copy an MDB environment to the specified path.
 	 *
diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 04a9f1c..39da579 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -3378,7 +3378,7 @@ fail:
 #define	CHANGELESS	(MDB_FIXEDMAP|MDB_NOSUBDIR|MDB_RDONLY|MDB_WRITEMAP)
 
 int
-mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode)
+mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode)
 {
 	int		oflags, rc, len, excl;
 	char *lpath, *dpath;