diff --git a/tsdb/chunks/head_chunks.go b/tsdb/chunks/head_chunks.go
index d82c12d33..051b9b1a8 100644
--- a/tsdb/chunks/head_chunks.go
+++ b/tsdb/chunks/head_chunks.go
@@ -70,7 +70,7 @@ const (
 	DefaultWriteBufferSize = 4 * 1024 * 1024 // 4 MiB.
 )
 
-// corruptionErr is an error that's returned when corruption is encountered.
+// CorruptionErr is an error that's returned when corruption is encountered.
 type CorruptionErr struct {
 	Dir       string
 	FileIndex int