diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 716d9f01f..46d325f31 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -586,6 +586,9 @@ class Coder:
         mentioned_rel_fnames = set()
         fname_to_rel_fnames = {}
         for rel_fname in addable_rel_fnames:
+            if rel_fname in words:
+                mentioned_rel_fnames.add(str(rel_fname))
+
             fname = os.path.basename(rel_fname)
             if fname not in fname_to_rel_fnames:
                 fname_to_rel_fnames[fname] = []
diff --git a/tests/test_coder.py b/tests/test_coder.py
index 0708ee780..01c90e4a3 100644
--- a/tests/test_coder.py
+++ b/tests/test_coder.py
@@ -108,7 +108,7 @@ class TestCoder(unittest.TestCase):
         # Call the check_for_file_mentions method
         coder.check_for_file_mentions("Please check file1.txt!")
 
-        self.assertEqual(coder.abs_fnames, set())
+        self.assertEqual(coder.abs_fnames, set([str(Path("file1.txt").resolve())]))
 
     def test_check_for_subdir_mention(self):
         # Mock the IO object
@@ -124,7 +124,7 @@ class TestCoder(unittest.TestCase):
         # Call the check_for_file_mentions method
         coder.check_for_file_mentions("Please check `other/file1.txt`")
 
-        self.assertEqual(coder.abs_fnames, set([Path("other/file1.txt").resolve()]))
+        self.assertEqual(coder.abs_fnames, set([str(Path("other/file1.txt").resolve())]))
 
     def test_get_commit_message(self):
         # Mock the IO object