diff --git a/pkg/controller/podautoscaler/horizontal.go b/pkg/controller/podautoscaler/horizontal.go
index 1ef6704f3cf..5ec84ef5db2 100644
--- a/pkg/controller/podautoscaler/horizontal.go
+++ b/pkg/controller/podautoscaler/horizontal.go
@@ -62,7 +62,7 @@ type timestampedRecommendation struct {
 }
 
 type timestampedScaleEvent struct {
-	replicaChange int32 // positive for scaleUp, negative for scaleDown
+	replicaChange int32 // absolute value, non-negative
 	timestamp     time.Time
 	outdated      bool
 }