diff --git a/aider/commands.py b/aider/commands.py
index f780e512005..79a1b33eb98 100644
--- a/aider/commands.py
+++ b/aider/commands.py
@@ -305,6 +305,7 @@ def cmd_add(self, args):
 
         for matched_file in all_matched_files:
             abs_file_path = self.coder.abs_root_path(matched_file)
+            rel_path = self.coder.get_rel_fname(matched_file)
 
             if not abs_file_path.startswith(self.coder.root):
                 self.io.tool_error(
@@ -312,7 +313,7 @@ def cmd_add(self, args):
                 )
                 continue
 
-            if self.coder.repo and matched_file not in git_files:
+            if self.coder.repo and rel_path not in git_files:
                 try:
                     self.coder.repo.repo.git.add(abs_file_path)
                     git_added.append(matched_file)
diff --git a/tests/test_commands.py b/tests/test_commands.py
index 3957df8efce..7ff801ba8c8 100644
--- a/tests/test_commands.py
+++ b/tests/test_commands.py
@@ -432,3 +432,29 @@ def test_cmd_add_no_autocommit(self):
             # Assert that foo.txt has been `git add` but not `git commit`
             added_files = repo.git.diff("--cached", "--name-only").split()
             self.assertIn("foo.txt", added_files)
+
+    def test_cmd_add_existing_with_dirty_repo(self):
+        with GitTemporaryDirectory():
+            repo = git.Repo()
+
+            files = ["one.txt", "two.txt"]
+            for fname in files:
+                Path(fname).touch()
+                repo.git.add(fname)
+            repo.git.commit("-m", "initial")
+
+            commit = repo.head.commit.hexsha
+
+            # leave a dirty `git rm`
+            repo.git.rm("one.txt")
+
+            io = InputOutput(pretty=False, yes=True)
+            from aider.coders import Coder
+
+            coder = Coder.create(models.GPT35, None, io)
+            commands = Commands(io, coder)
+
+            # There's no reason this /add should trigger a commit
+            commands.cmd_add("two.txt")
+
+            self.assertEqual(commit, repo.head.commit.hexsha)