diff --git a/tsdb/querier.go b/tsdb/querier.go
index 2e15f0b08..912c95032 100644
--- a/tsdb/querier.go
+++ b/tsdb/querier.go
@@ -972,7 +972,7 @@ func (p *populateWithDelChunkSeriesIterator) populateChunksFromIterable() bool {
 		// Check if the encoding has changed (i.e. we need to create a new
 		// chunk as chunks can't have multiple encoding types).
 		// For the first sample, the following condition will always be true as
-		// ValNoneNone != ValFloat | ValHistogram | ValFloatHistogram.
+		// ValNone != ValFloat | ValHistogram | ValFloatHistogram.
 		if currentValueType != prevValueType {
 			if prevValueType != chunkenc.ValNone {
 				p.chunksFromIterable = append(p.chunksFromIterable, chunks.Meta{Chunk: currentChunk, MinTime: cmint, MaxTime: cmaxt})