diff --git a/aider/getinput.py b/aider/getinput.py
index 76315146e..85bc4fb11 100644
--- a/aider/getinput.py
+++ b/aider/getinput.py
@@ -26,7 +26,7 @@ class FileContentCompleter(Completer):
             with open(fname, "r") as f:
                 content = f.read()
 
-            for word in re.split(r"\W+", content):
+            for word in re.split(r'\W+', content):
                 if word.startswith(last_word):
                     yield Completion(word, start_position=-len(last_word))