diff --git a/internal/gatewayapi/contexts.go b/internal/gatewayapi/contexts.go
index 7d6aee73d9..fbd4c588f9 100644
--- a/internal/gatewayapi/contexts.go
+++ b/internal/gatewayapi/contexts.go
@@ -76,7 +76,8 @@ type ListenerContext struct {
 }
 
 func (l *ListenerContext) SetSupportedKinds(kinds ...gwapiv1.RouteGroupKind) {
-	l.gateway.Status.Listeners[l.listenerStatusIdx].SupportedKinds = kinds
+	l.gateway.Status.Listeners[l.listenerStatusIdx].SupportedKinds = make([]gwapiv1.RouteGroupKind, 0, len(kinds))
+	l.gateway.Status.Listeners[l.listenerStatusIdx].SupportedKinds = append(l.gateway.Status.Listeners[l.listenerStatusIdx].SupportedKinds, kinds...)
 }
 
 func (l *ListenerContext) IncrementAttachedRoutes() {
diff --git a/internal/gatewayapi/listener.go b/internal/gatewayapi/listener.go
index 724e835eb1..0c69d7b309 100644
--- a/internal/gatewayapi/listener.go
+++ b/internal/gatewayapi/listener.go
@@ -74,7 +74,7 @@ func (t *Translator) ProcessListeners(gateways []*GatewayContext, xdsIR resource
 			case gwapiv1.UDPProtocolType:
 				t.validateAllowedRoutes(listener, resource.KindUDPRoute)
 			default:
-				listener.SetSupportedKinds(gwapiv1.RouteGroupKind{Kind: "InvalidKind"})
+				listener.SetSupportedKinds()
 				status.SetGatewayListenerStatusCondition(listener.gateway.Gateway,
 					listener.listenerStatusIdx,
 					gwapiv1.ListenerConditionAccepted,
diff --git a/internal/gatewayapi/testdata/gateway-with-listener-with-unsupported-protocol.out.yaml b/internal/gatewayapi/testdata/gateway-with-listener-with-unsupported-protocol.out.yaml
index 373c2f894c..0875ec2454 100644
--- a/internal/gatewayapi/testdata/gateway-with-listener-with-unsupported-protocol.out.yaml
+++ b/internal/gatewayapi/testdata/gateway-with-listener-with-unsupported-protocol.out.yaml
@@ -34,8 +34,7 @@ gateways:
         status: "True"
         type: ResolvedRefs
       name: unsupported
-      supportedKinds:
-      - kind: InvalidKind
+      supportedKinds: []
 httpRoutes:
 - apiVersion: gateway.networking.k8s.io/v1
   kind: HTTPRoute