diff --git a/pkg/router/appmesh_v1beta2.go b/pkg/router/appmesh_v1beta2.go
index ad56f27b..5e496883 100644
--- a/pkg/router/appmesh_v1beta2.go
+++ b/pkg/router/appmesh_v1beta2.go
@@ -81,7 +81,7 @@ func (ar *AppMeshv1beta2Router) reconcileVirtualNode(canary *flaggerv1.Canary, n
 		Listeners: []appmeshv1.Listener{
 			{
 				PortMapping: appmeshv1.PortMapping{
-					Port:     appmeshv1.PortNumber(canary.Spec.Service.Port),
+					Port:     ar.getContainerPort(canary),
 					Protocol: protocol,
 				},
 			},
@@ -507,6 +507,14 @@ func (ar *AppMeshv1beta2Router) getProtocol(canary *flaggerv1.Canary) appmeshv1.
 	return appmeshv1.PortProtocolHTTP
 }
 
+func (ar *AppMeshv1beta2Router) getContainerPort(canary *flaggerv1.Canary) appmeshv1.PortNumber {
+	containerPort := canary.Spec.Service.Port
+	if canary.Spec.Service.TargetPort.IntVal > 0 {
+		containerPort = canary.Spec.Service.TargetPort.IntVal
+	}
+	return appmeshv1.PortNumber(containerPort)
+}
+
 func (ar *AppMeshv1beta2Router) gatewayAnnotations(canary *flaggerv1.Canary) map[string]string {
 	a := make(map[string]string)
 	domains := ""