diff --git a/src/denoiser.hpp b/src/denoiser.hpp
index b92ca4e3f..2d02cb9a4 100644
--- a/src/denoiser.hpp
+++ b/src/denoiser.hpp
@@ -662,8 +662,8 @@ struct DiscreteFlowDenoiser : public Denoiser {
     }
 
     void set_parameters() {
-        for (int i = 1; i < TIMESTEPS + 1; i++) {
-            sigmas[i - 1] = t_to_sigma(static_cast<float>(i));
+        for (int i = 0; i < TIMESTEPS; i++) {
+            sigmas[i] = t_to_sigma(static_cast<float>(i));
         }
     }