diff --git a/modules/models/diffusion/uni_pc/sampler.py b/modules/models/diffusion/uni_pc/sampler.py
index 6dd7c7fd8..953e786db 100644
--- a/modules/models/diffusion/uni_pc/sampler.py
+++ b/modules/models/diffusion/uni_pc/sampler.py
@@ -47,7 +47,7 @@ class UniPCSampler(object):
 
         # actual number of steps we'll run
         self.steps = max(
-                num_inference_steps - init_timestep,
+                init_timestep,
                 shared.opts.uni_pc_order+1,
             )