diff --git a/curvefs/src/client/kvclient/memcache_client.h b/curvefs/src/client/kvclient/memcache_client.h
index 57e82a7f44..d481f5e5e4 100644
--- a/curvefs/src/client/kvclient/memcache_client.h
+++ b/curvefs/src/client/kvclient/memcache_client.h
@@ -169,6 +169,7 @@ class MemCachedClient : public KVClient {
           LOG(ERROR) << "Get key = " << key << " error = " << *errorlog
                      << ", get_value_len = " << value_length
                      << ", expect_value_len = " << length;
+          free(res);
           memcached_free(tcli);
           tcli = nullptr;
         }