diff --git a/tsdb/head.go b/tsdb/head.go
index e18bd55a5..4435855e2 100644
--- a/tsdb/head.go
+++ b/tsdb/head.go
@@ -2161,7 +2161,7 @@ func overlapsClosedInterval(mint1, maxt1, mint2, maxt2 int64) bool {
 	return mint1 <= maxt2 && mint2 <= maxt1
 }
 
-// mappedChunks describes a head chunk on disk that has been mmapped
+// mmappedChunk describes a head chunk on disk that has been mmapped
 type mmappedChunk struct {
 	ref              chunks.ChunkDiskMapperRef
 	numSamples       uint16