diff --git a/includes/ApiVisualEditorEdit.php b/includes/ApiVisualEditorEdit.php
index 0a092e8d76..5d07cb22f4 100644
--- a/includes/ApiVisualEditorEdit.php
+++ b/includes/ApiVisualEditorEdit.php
@@ -314,7 +314,7 @@ class ApiVisualEditorEdit extends ApiBase {
 	 * Load some parsed wikitext of an edit from the serialisation cache.
 	 *
 	 * @param string $hash The key of the wikitext in the serialisation cache
-	 * @return string|null The wikitext
+	 * @return string|false The wikitext
 	 */
 	protected function trySerializationCache( $hash ) {
 		$cache = ObjectCache::getLocalClusterInstance();