diff --git a/source/istio_gateway.go b/source/istio_gateway.go
index 13861d72d..6ca6c9994 100644
--- a/source/istio_gateway.go
+++ b/source/istio_gateway.go
@@ -38,6 +38,10 @@ import (
 	"sigs.k8s.io/external-dns/endpoint"
 )
 
+// IstioGatewayIngressSource is the annotation used to determine if the gateway is implemented by an Ingress object
+// instead of a standard LoadBalancer service type
+const IstioGatewayIngressSource = "external-dns.alpha.kubernetes.io/ingress"
+
 // gatewaySource is an implementation of Source for Istio Gateway objects.
 // The gateway implementation uses the spec.servers.hosts values for the hostnames.
 // Use targetAnnotationKey to explicitly set Endpoint.
@@ -232,6 +236,19 @@ func (sc *gatewaySource) setResourceLabel(gateway *networkingv1alpha3.Gateway, e
 	}
 }
 
+func parseIngress(ingress string) (namespace, name string, err error) {
+	parts := strings.Split(ingress, "/")
+	if len(parts) == 2 {
+		namespace, name = parts[0], parts[1]
+	} else if len(parts) == 1 {
+		name = parts[0]
+	} else {
+		err = fmt.Errorf("invalid ingress name (name or namespace/name) found '%v'", ingress)
+	}
+
+	return
+}
+
 func (sc *gatewaySource) targetsFromIngress(ctx context.Context, ingressStr string, gateway *networkingv1alpha3.Gateway) (targets endpoint.Targets, err error) {
 	namespace, name, err := parseIngress(ingressStr)
 	if err != nil {
diff --git a/source/istio_virtualservice.go b/source/istio_virtualservice.go
index 1143bf0fa..3e7f79a74 100644
--- a/source/istio_virtualservice.go
+++ b/source/istio_virtualservice.go
@@ -42,10 +42,6 @@ import (
 // IstioMeshGateway is the built in gateway for all sidecars
 const IstioMeshGateway = "mesh"
 
-// IstioGatewayIngressSource is the annotation used to determine if the gateway is implemented by an Ingress object
-// instead of a standard LoadBalancer service type
-const IstioGatewayIngressSource = "external-dns.alpha.kubernetes.io/ingress"
-
 // virtualServiceSource is an implementation of Source for Istio VirtualService objects.
 // The implementation uses the spec.hosts values for the hostnames.
 // Use targetAnnotationKey to explicitly set Endpoint.
@@ -435,19 +431,6 @@ func parseGateway(gateway string) (namespace, name string, err error) {
 	return
 }
 
-func parseIngress(ingress string) (namespace, name string, err error) {
-	parts := strings.Split(ingress, "/")
-	if len(parts) == 2 {
-		namespace, name = parts[0], parts[1]
-	} else if len(parts) == 1 {
-		name = parts[0]
-	} else {
-		err = fmt.Errorf("invalid ingress name (name or namespace/name) found '%v'", ingress)
-	}
-
-	return
-}
-
 func (sc *virtualServiceSource) targetsFromIngress(ctx context.Context, ingressStr string, gateway *networkingv1alpha3.Gateway) (targets endpoint.Targets, err error) {
 	namespace, name, err := parseIngress(ingressStr)
 	if err != nil {