diff --git a/aider/repo.py b/aider/repo.py
index 7375cc654..12b94fcd0 100644
--- a/aider/repo.py
+++ b/aider/repo.py
@@ -354,6 +354,8 @@ class GitRepo:
     def path_in_repo(self, path):
         if not self.repo:
             return
+        if not path:
+            return
 
         tracked_files = set(self.get_tracked_files())
         return self.normalize_path(path) in tracked_files