diff --git a/scripts/data_prep/convert_dataset_hf.py b/scripts/data_prep/convert_dataset_hf.py
index f33f24e478..69d4684eac 100644
--- a/scripts/data_prep/convert_dataset_hf.py
+++ b/scripts/data_prep/convert_dataset_hf.py
@@ -232,7 +232,7 @@ def build_hf_dataset(
     else:
         if not isinstance(tokenizer, PreTrainedTokenizerBase):
             raise ValueError(
-                f'{tokenizer=} must be of type PreTrainedTokenizerBase')
+                f'{tokenizer} must be of type PreTrainedTokenizerBase')
         if max_length is None:
             raise ValueError(f'max_length must be set.')
         if bos_text + eos_text == '':