diff --git a/tsdb/index/postings.go b/tsdb/index/postings.go
index eb572704c3..56e8d3d82a 100644
--- a/tsdb/index/postings.go
+++ b/tsdb/index/postings.go
@@ -858,9 +858,9 @@ func NewPostingsCloner(p Postings) *PostingsCloner {
 	// so the returned slice capacity may be well above the actual number of items.
 	// In such case, we shrink it.
 	if float64(len(ids)) < float64(cap(ids))*0.70 {
-		shrinked := make([]storage.SeriesRef, len(ids))
-		copy(shrinked, ids)
-		ids = shrinked
+		shrunk := make([]storage.SeriesRef, len(ids))
+		copy(shrunk, ids)
+		ids = shrunk
 	}
 
 	return &PostingsCloner{ids: ids, err: err}
diff --git a/tsdb/index/postings_test.go b/tsdb/index/postings_test.go
index 61a1ca3de1..a5cdbd7895 100644
--- a/tsdb/index/postings_test.go
+++ b/tsdb/index/postings_test.go
@@ -1108,13 +1108,13 @@ func TestNewPostingsCloner_ShrinkExpandedPostingsSlice(t *testing.T) {
 	t.Run("should not shrink expanded postings if length is >= 70% capacity", func(t *testing.T) {
 		cloner := NewPostingsCloner(NewListPostings(make([]storage.SeriesRef, 60)))
 		assert.Equal(t, 60, len(cloner.ids))
-		assert.Equal(t, 64, cap(cloner.ids)) // Not shrinked.
+		assert.Equal(t, 64, cap(cloner.ids)) // Not shrunk.
 	})
 
 	t.Run("should shrink expanded postings if length is < 70% capacity", func(t *testing.T) {
 		cloner := NewPostingsCloner(NewListPostings(make([]storage.SeriesRef, 33)))
 		assert.Equal(t, 33, len(cloner.ids))
-		assert.Equal(t, 33, cap(cloner.ids)) // Shrinked.
+		assert.Equal(t, 33, cap(cloner.ids)) // Shrunk.
 	})
 }