diff --git a/inc/session_handler/class-disallowed-session-handler.php b/inc/session_handler/class-disallowed-session-handler.php
index ea752c0d..aa02c591 100644
--- a/inc/session_handler/class-disallowed-session-handler.php
+++ b/inc/session_handler/class-disallowed-session-handler.php
@@ -29,7 +29,10 @@ function destroy( string $id ) : bool {
 		trigger_error( 'PHP Sessions requires Redis integration, which is currently not activated.', E_USER_WARNING );
 		return false;
 	}
-	function read( string $id ) : string | false {
+	/**
+	 * @return string|false
+	 */
+	function read( string $id ) {
 		trigger_error( 'PHP Sessions requires Redis integration, which is currently not activated.', E_USER_WARNING );
 		return false;
 	}
@@ -37,7 +40,10 @@ function write( string $id, string $data ) : bool {
 		trigger_error( 'PHP Sessions requires Redis integration, which is currently not activated.', E_USER_WARNING );
 		return false;
 	}
-	function gc( int $maxlifetime ) : int | false {
+	/**
+	 * @return int|false
+	 */
+	function gc( int $maxlifetime ) {
 		trigger_error( 'PHP Sessions requires Redis integration, which is currently not activated.', E_USER_WARNING );
 		return false;
 	}