diff --git a/vllm/patches/deepseek_v4.py b/vllm/patches/deepseek_v4.py
index abf2a2ad..61625034 100644
--- a/vllm/patches/deepseek_v4.py
+++ b/vllm/patches/deepseek_v4.py
@@ -526,8 +526,8 @@ class DeepseekV4MegaMoEExperts(nn.Module):
             l2_igs = w2_igs[:, 0]
         else:
             l2_igs = w2_igs
-        self._cutedsl_runner.l1_activation_global_scale = l1_igs.mean().item()
-        self._cutedsl_runner.l2_activation_global_scale = l2_igs.mean().item()
+        self._cutedsl_runner._l1_activation_global_scale = l1_igs.mean().item()
+        self._cutedsl_runner._l2_activation_global_scale = l2_igs.mean().item()
 
         # Drop the original loader-side parameters
         self._w13_input_scale = self.w13_input_scale.data.clone()