diff --git a/contrib/db/liblmdb/mdb.c b/contrib/db/liblmdb/mdb.c
index ca9f3b12..f9b48233 100644
--- a/contrib/db/liblmdb/mdb.c
+++ b/contrib/db/liblmdb/mdb.c
@@ -133,7 +133,7 @@ extern int cacheflush(char *addr, int nbytes, int cache);
 #ifdef _WIN32
 typedef int64_t off64_t;
 #else
-typedef off_t off64_t;
+//typedef off_t off64_t;
 #endif