diff --git a/util/stats/query_stats.go b/util/stats/query_stats.go
index 206131aa8..9c0c42b32 100644
--- a/util/stats/query_stats.go
+++ b/util/stats/query_stats.go
@@ -50,7 +50,7 @@ func (s QueryTiming) String() string {
 	}
 }
 
-// QueryTimings with all query timers mapped to durations.
+// queryTimings with all query timers mapped to durations.
 type queryTimings struct {
 	EvalTotalTime        float64 `json:"evalTotalTime"`
 	ResultSortTime       float64 `json:"resultSortTime"`
@@ -61,7 +61,7 @@ type queryTimings struct {
 	ExecTotalTime        float64 `json:"execTotalTime"`
 }
 
-// QueryStats currently only holding query timings
+// QueryStats currently only holding query timings.
 type QueryStats struct {
 	Timings queryTimings `json:"timings,omitempty"`
 }
diff --git a/util/stats/stats_test.go b/util/stats/stats_test.go
index b56932a34..e7ef2717b 100644
--- a/util/stats/stats_test.go
+++ b/util/stats/stats_test.go
@@ -1,4 +1,4 @@
-// Copyright 2015 The Prometheus Authors
+// Copyright 2017 The Prometheus Authors
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at