diff --git a/funasr/export/models/modules/multihead_att.py b/funasr/export/models/modules/multihead_att.py
index 1983db8b6..6fce85166 100644
--- a/funasr/export/models/modules/multihead_att.py
+++ b/funasr/export/models/modules/multihead_att.py
@@ -75,8 +75,8 @@ def preprocess_for_attn(x, mask, cache, pad_fn):
     return x, cache
 
 
-torch_version = float(".".join(torch.__version__.split(".")[:2]))
-if torch_version >= 1.8:
+torch_version = tuple([int(i) for i in torch.__version__.split(".")[:2]])
+if torch_version >= (1, 8):
     import torch.fx
     torch.fx.wrap('preprocess_for_attn')