diff --git a/python/sglang/srt/layers/quantization/fp8.py b/python/sglang/srt/layers/quantization/fp8.py
index 687bd96bb..290155641 100644
--- a/python/sglang/srt/layers/quantization/fp8.py
+++ b/python/sglang/srt/layers/quantization/fp8.py
@@ -2358,10 +2358,15 @@ class Fp8MoEMethod(FusedMoEMethodBase):
         """Materialize optional TRT-LLM SwiGLU parameters once per expert."""
         num_experts = int(layer.num_local_experts)
         device = layer.w13_weight.device
+        clamp_limit = (
+            self.moe_runner_config.gemm1_clamp_limit
+            if self.moe_runner_config.gemm1_clamp_limit is not None
+            else self.moe_runner_config.swiglu_limit
+        )
         for name, value in (
             ("gemm1_alpha", self.moe_runner_config.gemm1_alpha),
             ("gemm1_beta", self.moe_runner_config.gemm1_beta),
-            ("gemm1_clamp_limit", self.moe_runner_config.gemm1_clamp_limit),
+            ("gemm1_clamp_limit", clamp_limit),
         ):
             tensor = (
                 None