diff --git a/src/transformers/models/pegasus/tokenization_pegasus_fast.py b/src/transformers/models/pegasus/tokenization_pegasus_fast.py
index 626d930398a..721d5ef9c3b 100644
--- a/src/transformers/models/pegasus/tokenization_pegasus_fast.py
+++ b/src/transformers/models/pegasus/tokenization_pegasus_fast.py
@@ -54,7 +54,7 @@ class PegasusTokenizerFast(PreTrainedTokenizerFast):
     Construct a "fast" PEGASUS tokenizer (backed by HuggingFace's `tokenizers` library). Based on `Unigram
     <https://huggingface.co/docs/tokenizers/python/latest/components.html?highlight=unigram#models>`__.
 
-    This tokenizer inherits from :class:`~transformers.PreTrainedTokenizer` which contains most of the main methods.
+    This tokenizer inherits from :class:`~transformers.PreTrainedTokenizerFast` which contains most of the main methods.
     Users should refer to this superclass for more information regarding those methods.
 
     Args: