diff --git a/vllm_ascend/spec_decode/eagle_proposer.py b/vllm_ascend/spec_decode/eagle_proposer.py
index e342227..d14dc6d 100644
--- a/vllm_ascend/spec_decode/eagle_proposer.py
+++ b/vllm_ascend/spec_decode/eagle_proposer.py
@@ -1,5 +1,4 @@
 # SPDX-License-Identifier: Apache-2.0
-import os
 from typing import Optional
 
 import numpy as np
@@ -72,8 +71,7 @@ class EagleProposer(Proposer):
                                    1,
                                    device=device,
                                    dtype=torch.int32)
-        attn_mask_len = min(self.vllm_config.model_config.max_model_len,
-                            int(os.getenv("PAGED_ATTENTION_MASK_LEN", 10000)))
+        attn_mask_len = self.vllm_config.model_config.max_model_len
         self.attn_mask_builder = AttentionMaskBuilder(
             attn_mask_len, self.vllm_config.model_config.dtype)