diff --git a/vllm/platforms/xpu.py b/vllm/platforms/xpu.py
index 454d2301e..c97c3297e 100644
--- a/vllm/platforms/xpu.py
+++ b/vllm/platforms/xpu.py
@@ -201,9 +201,6 @@ class XPUPlatform(Platform):
 
         if vllm_config.lora_config is not None:
             compilation_config.mode = CompilationMode.NONE
-        # decrease triton kernel compilation scratch space for speculative decoding
-        if vllm_config.speculative_config is not None:
-            os.environ["IGC_ForceOCLSIMDWidth"] = "16"  # noqa: SIM112
         # check and update parallel config
         parallel_config = vllm_config.parallel_config
         # Only override worker_cls if it's still the default "auto"