diff --git a/aider/repo.py b/aider/repo.py
index ad0197273..6ec4a0f4a 100644
--- a/aider/repo.py
+++ b/aider/repo.py
@@ -259,6 +259,7 @@ class GitRepo:
         return str(Path(PurePosixPath((Path(self.root) / path).relative_to(self.root))))
 
     def ignored_file(self, fname):
+        orig_fname = fname
         if fname in self.ignore_file_cache:
             return self.ignore_file_cache[fname]
 
@@ -266,6 +267,7 @@ class GitRepo:
             try:
                 fname_path = Path(self.normalize_path(fname)).resolve()
                 cwd_path = Path.cwd().resolve()
+
                 if not fname_path.is_relative_to(cwd_path):
                     return True
             except ValueError:
@@ -290,7 +292,7 @@ class GitRepo:
             )
 
         result = self.aider_ignore_spec.match_file(fname)
-        self.ignore_file_cache[fname] = result
+        self.ignore_file_cache[orig_fname] = result
         return result
 
     def path_in_repo(self, path):