diff --git a/include/leveldb/status.h b/include/leveldb/status.h
index 02341de..e4943be 100755
--- a/include/leveldb/status.h
+++ b/include/leveldb/status.h
@@ -85,7 +85,8 @@ class LEVELDB_EXPORT Status {
     kCorruption = 2,
     kNotSupported = 3,
     kInvalidArgument = 4,
-    kIOError = 5
+    kIOError = 5,
+    kExpire = 6
   };
 
   Code code() const {