diff --git a/src/repository/api/ArcanistMercurialAPI.php b/src/repository/api/ArcanistMercurialAPI.php
index a186513b..efe51198 100644
--- a/src/repository/api/ArcanistMercurialAPI.php
+++ b/src/repository/api/ArcanistMercurialAPI.php
@@ -109,7 +109,7 @@ final class ArcanistMercurialAPI extends ArcanistRepositoryAPI {
     return $this->branch;
   }
 
-  public function didReloadCommitRange() {
+  protected function didReloadCommitRange() {
     $this->localCommitInfo = null;
   }