diff --git a/extensions-builtin/forge_preprocessor_reference/scripts/forge_reference.py b/extensions-builtin/forge_preprocessor_reference/scripts/forge_reference.py
index a870b36b..8d5d4250 100644
--- a/extensions-builtin/forge_preprocessor_reference/scripts/forge_reference.py
+++ b/extensions-builtin/forge_preprocessor_reference/scripts/forge_reference.py
@@ -94,7 +94,7 @@ class PreprocessorReference(Preprocessor):
         unet.add_block_modifier(block_proc)
         unet.add_conditioning_modifier(conditioning_modifier)
         unet.set_model_attn1_patch(attn1_proc)
-        unet.set_model_attn1_patch(attn1_output_proc)
+        unet.set_model_attn1_output_patch(attn1_output_proc)
 
         process.sd_model.forge_objects.unet = unet