diff --git a/api/v1alpha1/timeout_types.go b/api/v1alpha1/timeout_types.go
index 6493f527558..2c86f34b3ff 100644
--- a/api/v1alpha1/timeout_types.go
+++ b/api/v1alpha1/timeout_types.go
@@ -54,5 +54,5 @@ type HTTPClientTimeout struct {
 	// Default: 300 seconds.
 	//
 	// +optional
-	RequestProcessTimeout *gwapiv1.Duration `json:"requestProcessTimeout"`
+	RequestProcessTimeout *gwapiv1.Duration `json:"requestProcessTimeout,omitempty"`
 }