diff --git a/lib/session.js b/lib/session.js
index ba271e2..c424810 100644
--- a/lib/session.js
+++ b/lib/session.js
@@ -182,7 +182,7 @@ class Session {
   }
 
   getMessagePath(rev) {
-    return path.join(this.pullDir, `${shortSha(rev)}-message`);
+    return path.join(this.pullDir, `${shortSha(rev)}.COMMIT_EDITMSG`);
   }
 
   updateSession(update) {