diff --git a/tsdb/index/postingsstats.go b/tsdb/index/postingsstats.go
index 70622b3d27..0ad4e08575 100644
--- a/tsdb/index/postingsstats.go
+++ b/tsdb/index/postingsstats.go
@@ -63,6 +63,15 @@ func (m *maxHeap) push(item Stat) {
 }
 
 func (m *maxHeap) get() []Stat {
-	slices.SortFunc(m.Items, func(a, b Stat) int { return int(b.Count - a.Count) })
+	slices.SortFunc(m.Items, func(a, b Stat) int {
+		switch {
+		case b.Count < a.Count:
+			return -1
+		case b.Count > a.Count:
+			return 1
+		default:
+			return 0
+		}
+	})
 	return m.Items
 }
diff --git a/tsdb/ooo_head_read.go b/tsdb/ooo_head_read.go
index 186f466331..7b24d8c20a 100644
--- a/tsdb/ooo_head_read.go
+++ b/tsdb/ooo_head_read.go
@@ -184,17 +184,39 @@ type chunkMetaAndChunkDiskMapperRef struct {
 }
 
 func refLessByMinTimeAndMinRef(a, b chunkMetaAndChunkDiskMapperRef) int {
-	if a.meta.MinTime == b.meta.MinTime {
-		return int(a.meta.Ref - b.meta.Ref)
+	switch {
+	case a.meta.MinTime < b.meta.MinTime:
+		return -1
+	case a.meta.MinTime > b.meta.MinTime:
+		return 1
+	}
+
+	switch {
+	case a.meta.Ref < b.meta.Ref:
+		return -1
+	case a.meta.Ref > b.meta.Ref:
+		return 1
+	default:
+		return 0
 	}
-	return int(a.meta.MinTime - b.meta.MinTime)
 }
 
 func lessByMinTimeAndMinRef(a, b chunks.Meta) int {
-	if a.MinTime == b.MinTime {
-		return int(a.Ref - b.Ref)
+	switch {
+	case a.MinTime < b.MinTime:
+		return -1
+	case a.MinTime > b.MinTime:
+		return 1
+	}
+
+	switch {
+	case a.Ref < b.Ref:
+		return -1
+	case a.Ref > b.Ref:
+		return 1
+	default:
+		return 0
 	}
-	return int(a.MinTime - b.MinTime)
 }
 
 func (oh *OOOHeadIndexReader) Postings(ctx context.Context, name string, values ...string) (index.Postings, error) {