diff --git a/scripts/pixelsmith_ext.py b/scripts/pixelsmith_ext.py
index bc73d1e4b..9de00ab99 100644
--- a/scripts/pixelsmith_ext.py
+++ b/scripts/pixelsmith_ext.py
@@ -46,6 +46,7 @@ class PixelSmithScript(scripts_manager.Script):
         supported_model_list = ['sdxl']
         if shared.sd_model_type not in supported_model_list:
             log.warning(f'PixelSmith: class={shared.sd_model.__class__.__name__} model={shared.sd_model_type} required={supported_model_list}')
+            return None
         from scripts.pixelsmith import PixelSmithXLPipeline, PixelSmithVAE # pylint: disable=no-name-in-module
         self.orig_pipe = shared.sd_model
         self.orig_vae = shared.sd_model.vae