diff --git a/src/diffusers/pipeline_utils.py b/src/diffusers/pipeline_utils.py
index aa67ccb154..d41832c32d 100644
--- a/src/diffusers/pipeline_utils.py
+++ b/src/diffusers/pipeline_utils.py
@@ -40,6 +40,7 @@ LOADABLE_CLASSES = {
     },
     "transformers": {
         "PreTrainedTokenizer": ["save_pretrained", "from_pretrained"],
+        "PreTrainedTokenizerFast": ["save_pretrained", "from_pretrained"],
         "PreTrainedModel": ["save_pretrained", "from_pretrained"],
     },
 }