diff --git a/invokeai/app/invocations/denoise_latents.py b/invokeai/app/invocations/denoise_latents.py
index 0f4fcd1ef0..a572cd6f05 100644
--- a/invokeai/app/invocations/denoise_latents.py
+++ b/invokeai/app/invocations/denoise_latents.py
@@ -386,8 +386,8 @@ class DenoiseLatentsInvocation(BaseInvocation):
             requires_safety_checker=False,
         )
 
+    @staticmethod
     def prep_control_data(
-        self,
         context: InvocationContext,
         control_input: Optional[Union[ControlField, List[ControlField]]],
         latents_shape: List[int],