diff --git a/mindone/diffusers/__init__.py b/mindone/diffusers/__init__.py
index 091c35ed57..eac4836f7a 100644
--- a/mindone/diffusers/__init__.py
+++ b/mindone/diffusers/__init__.py
@@ -162,6 +162,7 @@
         "DPMSolverMultistepScheduler",
         "DPMSolverMultistepInverseScheduler",
         "DPMSolverSinglestepScheduler",
+        "EDMDPMSolverMultistepScheduler",
         "EDMEulerScheduler",
         "EulerAncestralDiscreteScheduler",
         "EulerDiscreteScheduler",
diff --git a/mindone/diffusers/schedulers/scheduling_edm_euler.py b/mindone/diffusers/schedulers/scheduling_edm_euler.py
index f359339bd1..439742a6de 100644
--- a/mindone/diffusers/schedulers/scheduling_edm_euler.py
+++ b/mindone/diffusers/schedulers/scheduling_edm_euler.py
@@ -249,18 +249,22 @@ def index_for_timestep(self, timestep, schedule_timesteps=None):
         if schedule_timesteps is None:
             schedule_timesteps = self.timesteps
 
-        if (schedule_timesteps == timestep).sum() > 1:
-            pos = 1
-        else:
-            pos = 0
+        index_candidates_num = (schedule_timesteps == timestep).sum()
 
+        if index_candidates_num == 0:
+            step_index = len(self.timesteps) - 1
         # The sigma index that is taken for the **very** first `step`
         # is always the second index (or the last index if there is only 1)
         # This way we can ensure we don't accidentally skip a sigma in
         # case we start in the middle of the denoising schedule (e.g. for image-to-image)
-        indices = (schedule_timesteps == timestep).nonzero()
+        else:
+            if index_candidates_num > 1:
+                pos = 1
+            else:
+                pos = 0
+            step_index = int((schedule_timesteps == timestep).nonzero()[pos])
 
-        return int(indices[pos])
+        return step_index
 
     # Copied from diffusers.schedulers.scheduling_euler_discrete.EulerDiscreteScheduler._init_step_index
     def _init_step_index(self, timestep):