diff --git a/ldm/invoke/generator/omnibus.py b/ldm/invoke/generator/omnibus.py
index 7eaefee0c63..d6b5b164ab8 100644
--- a/ldm/invoke/generator/omnibus.py
+++ b/ldm/invoke/generator/omnibus.py
@@ -167,6 +167,8 @@ def sample_to_image(self, samples)->Image.Image:
 
         if self.pil_image is None or self.pil_mask is None:
             return gen_result
+        if self.pil_image.size != self.pil_mask.size:
+            return gen_result
 
         corrected_result = super(Img2Img, self).repaste_and_color_correct(gen_result, self.pil_image, self.pil_mask, self.mask_blur_radius)