diff --git a/cherry_picker/cherry_picker.py b/cherry_picker/cherry_picker.py
index 52df11d..224f0c6 100755
--- a/cherry_picker/cherry_picker.py
+++ b/cherry_picker/cherry_picker.py
@@ -636,7 +636,7 @@ def continue_cherry_pick(self):
             ]
             self.commit_sha1 = get_full_sha_from_short(short_sha)
 
-            commits = get_commits_from_backport_branch(base)
+            commits = get_commits_from_backport_branch(f"{self.upstream}/{base}")
             if len(commits) == 1:
                 commit_message = self.amend_commit_message(cherry_pick_branch)
             else: