1 files changed, 2 insertions, 2 deletions
diff --git a/includes/site/Site.php b/includes/site/Site.php
index 5c640613fc69..e84f1c7ce1ea 100644
--- a/includes/site/Site.php
+++ b/includes/site/Site.php
@@ -672,7 +672,7 @@ class Site implements Serializable {
 	 *
 	 * @return string
 	 */
-	public function serialize() {
+	public function serialize(): string {
 		return serialize( $this->__serialize() );
 	}
 
@@ -705,7 +705,7 @@ class Site implements Serializable {
 	 *
 	 * @param string $serialized
 	 */
-	public function unserialize( $serialized ) {
+	public function unserialize( $serialized ): void {
 		$this->__unserialize( unserialize( $serialized ) );
 	}