diff --git a/pkg/apis/rollouts/validation/validation.go b/pkg/apis/rollouts/validation/validation.go
index 836c9befad..60d8e79fb3 100644
--- a/pkg/apis/rollouts/validation/validation.go
+++ b/pkg/apis/rollouts/validation/validation.go
@@ -302,8 +302,7 @@ func ValidateRolloutStrategyCanary(rollout *v1alpha1.Rollout, fldPath *field.Pat
 			trafficRouting := rollout.Spec.Strategy.Canary.TrafficRouting
 			if trafficRouting == nil || (trafficRouting.Istio == nil && trafficRouting.ALB == nil) {
 				allErrs = append(allErrs, field.Invalid(stepFldPath.Child("setHeaderRouting"), step.SetHeaderRouting, InvalidSetHeaderRoutingTrafficPolicy))
-			}
-			if step.SetHeaderRouting.Match != nil && len(step.SetHeaderRouting.Match) > 0 {
+			} else if step.SetHeaderRouting.Match != nil && len(step.SetHeaderRouting.Match) > 0 {
 				for j, match := range step.SetHeaderRouting.Match {
 					if trafficRouting.ALB != nil {
 						matchFld := stepFldPath.Child("setHeaderRouting").Child("match").Index(j)