diff --git a/libraries/liblmdb/mdb_copy.c b/libraries/liblmdb/mdb_copy.c
index e7f965c..af0a941 100644
--- a/libraries/liblmdb/mdb_copy.c
+++ b/libraries/liblmdb/mdb_copy.c
@@ -64,7 +64,7 @@ int main(int argc,char * argv[])
 	act = "opening environment";
 	rc = mdb_env_create(&env);
 	if (rc == MDB_SUCCESS) {
-		rc = mdb_env_open(env, argv[1], flags, 0664);
+		rc = mdb_env_open(env, argv[1], flags, 0600);
 	}
 	if (rc == MDB_SUCCESS) {
 		act = "copying";