diff --git a/src/Core/Protocol.php b/src/Core/Protocol.php
index 3484d281b1..796add5558 100644
--- a/src/Core/Protocol.php
+++ b/src/Core/Protocol.php
@@ -269,7 +269,7 @@ class Protocol
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	public static function revokeFollow(array $contact)
+	public static function revokeFollow(array $contact): ?bool
 	{
 		if (empty($contact['network'])) {
 			throw new \InvalidArgumentException('Missing network key in contact array');
diff --git a/src/Model/Contact.php b/src/Model/Contact.php
index cbe370a4aa..918eab384f 100644
--- a/src/Model/Contact.php
+++ b/src/Model/Contact.php
@@ -857,7 +857,7 @@ class Contact
 	 * @throws HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	public static function revokeFollow(array $contact): bool
+	public static function revokeFollow(array $contact): ?bool
 	{
 		if (empty($contact['network'])) {
 			throw new \InvalidArgumentException('Empty network in contact array');