diff --git a/fastdeploy/engine/args_utils.py b/fastdeploy/engine/args_utils.py
index 3f7952fc5aa..a98429b1845 100644
--- a/fastdeploy/engine/args_utils.py
+++ b/fastdeploy/engine/args_utils.py
@@ -486,8 +486,6 @@ def __post_init__(self):
             self.tokenizer = self.model
         if self.splitwise_role == "decode":
             self.enable_prefix_caching = False
-        if self.speculative_config is not None:
-            self.enable_prefix_caching = False
         if not current_platform.is_cuda() and not current_platform.is_xpu() and not current_platform.is_intel_hpu():
             self.enable_prefix_caching = False
         # if self.dynamic_load_weight: