diff --git a/src/transformers/tokenization_blenderbot.py b/src/transformers/tokenization_blenderbot.py
index d93962598851bf..ec350cf2625350 100644
--- a/src/transformers/tokenization_blenderbot.py
+++ b/src/transformers/tokenization_blenderbot.py
@@ -160,7 +160,7 @@ def bpe(self, token: str) -> str:
             return self.cache[token]
         token = re.sub("([.,!?()])", r" \1", token)
         token = re.sub("(')", r" \1 ", token)
-        token = re.sub("\s{2,}", " ", token)
+        token = re.sub(r"\s{2,}", " ", token)
         if "\n" in token:
             token = token.replace("\n", " __newln__")