diff --git a/src/proto/grpc/testing/metrics.proto b/src/proto/grpc/testing/metrics.proto
index 0cc4b602396f780b05cdce10b2837e93683a0215..1202b20b8fd0f957a0ee0033fa7430ede42b0e25 100644
--- a/src/proto/grpc/testing/metrics.proto
+++ b/src/proto/grpc/testing/metrics.proto
@@ -1,4 +1,4 @@
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -42,7 +42,7 @@ message GaugeResponse {
   string name = 1;
   oneof value {
     int64 long_value = 2;
-    double double_vale = 3;
+    double double_value = 3;
     string string_value = 4;
   }
 }