diff --git a/unsloth/trainer.py b/unsloth/trainer.py
index dc4e814578..f3e09e990b 100644
--- a/unsloth/trainer.py
+++ b/unsloth/trainer.py
@@ -60,7 +60,7 @@ _AUTO_PADDING_FREE_ENV_DISABLED = os.environ.get(
 
 # [TODO]
 # Below cannot work with padding-free
-_PADDING_FREE_BLOCK_LIST = {
+PADDING_FREE_BLOCKLIST = {
     "gemma2",  # - gemma2:  Uses slow_attention_softcapping which has torch.compile issues
     "gpt_oss",  # - gpt_oss: Uses Flex Attention which doesn't handle padding_free correctly
     "mistral",  # - mistral: Unfortunately I think sliding window attention doesn't work correctly?