diff --git a/unsloth/models/llama.py b/unsloth/models/llama.py
index 27651be97a..909dfc339b 100644
--- a/unsloth/models/llama.py
+++ b/unsloth/models/llama.py
@@ -775,9 +775,12 @@ def LlamaModel_fast_forward(
             self.SWA_mask = True
             self.GA_mask  = False
         elif attention_mask is not None:
-
             # Fixes https://github.com/unslothai/unsloth/issues/853
             # Unsloth needs a 2D mask, not a [2, 1, n, n] mask!
+
+            # https://github.com/pytorch/pytorch/issues/103749
+            # Need to convert to float and not using bool
+            attention_mask = (1.0 - attention_mask.float()) * torch.finfo(inputs_embeds.dtype).min
             dynamic_SWA_mask = _prepare_4d_causal_attention_mask_for_sdpa(
                 attention_mask,
                 (batch_size, seq_length),