diff --git a/CHANGELOG.md b/CHANGELOG.md
index f29a8402d90..1decf86b920 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -67,6 +67,7 @@ To learn more about active deprecations, we recommend checking [GitHub Discussio
 - **General:** Respect optional parameter inside envs for ScaledJobs ([#3568](https://github.com/kedacore/keda/issues/3568))
 - **Azure Blob Scaler** Store forgotten logger ([#3811](https://github.com/kedacore/keda/issues/3811))
 - **Prometheus Scaler:** Treat Inf the same as Null result ([#3644](https://github.com/kedacore/keda/issues/3644))
+- **NATS Jetstream:** Correctly count messages that should be redelivered (waiting for ack) towards keda value ([#3787](https://github.com/kedacore/keda/issues/3787))
 
 ### Deprecations
 
diff --git a/pkg/scalers/nats_jetstream_scaler.go b/pkg/scalers/nats_jetstream_scaler.go
index 7903bba17b7..4d944e00604 100644
--- a/pkg/scalers/nats_jetstream_scaler.go
+++ b/pkg/scalers/nats_jetstream_scaler.go
@@ -195,7 +195,7 @@ func (s *natsJetStreamScaler) getMaxMsgLag() int64 {
 
 	for _, consumer := range s.stream.Consumers {
 		if consumer.Name == consumerName {
-			return int64(consumer.NumPending)
+			return int64(consumer.NumPending + consumer.NumAckPending)
 		}
 	}
 	return s.stream.State.LastSequence