diff --git a/python/sglang/jit_kernel/diffusion/cutedsl/scale_residual_norm_scale_shift.py b/python/sglang/jit_kernel/diffusion/cutedsl/scale_residual_norm_scale_shift.py
index ba8782d3d8e4..734b9bbf78ad 100644
--- a/python/sglang/jit_kernel/diffusion/cutedsl/scale_residual_norm_scale_shift.py
+++ b/python/sglang/jit_kernel/diffusion/cutedsl/scale_residual_norm_scale_shift.py
@@ -341,7 +341,7 @@ def fused_norm_scale_shift(
 
 
 @fused_norm_scale_shift.register_fake
-def _fused_norm_scale_shift_fake(x, weight, bias, scale, shift, norm_type, eps):
+def _fused_norm_scale_shift_fake(x, weight, bias, scale, shift, norm_type, eps=1e-5):
     y = x.new_empty(x.shape)
     return y
 
@@ -424,7 +424,7 @@ def fused_scale_residual_norm_scale_shift(
 
 @fused_scale_residual_norm_scale_shift.register_fake
 def _fused_scale_residual_norm_scale_shift_fake(
-    residual, x, gate, weight, bias, scale, shift, norm_type, eps
+    residual, x, gate, weight, bias, scale, shift, norm_type, eps=1e-5
 ):
     y = x.new_empty(x.shape)
     residual_out = x.new_empty(x.shape)