diff --git a/comfy/k_diffusion/sampling.py b/comfy/k_diffusion/sampling.py
index a28a30ac..5b8d8000 100644
--- a/comfy/k_diffusion/sampling.py
+++ b/comfy/k_diffusion/sampling.py
@@ -1419,6 +1419,6 @@ def sample_er_sde(model, x, sigmas, extra_args=None, callback=None, disable=None
             old_denoised_d = denoised_d
 
         if s_noise != 0 and sigmas[i + 1] > 0:
-            x = x + noise_sampler(sigmas[i], sigmas[i + 1]) * s_noise * (sigmas[i + 1] ** 2 - sigmas[i] ** 2 * r ** 2).sqrt()
+            x = x + noise_sampler(sigmas[i], sigmas[i + 1]) * s_noise * (sigmas[i + 1] ** 2 - sigmas[i] ** 2 * r ** 2).sqrt().nan_to_num(nan=0.0)
         old_denoised = denoised
     return x