diff --git a/modules/processing.py b/modules/processing.py
index ee0e9e342..d07e3db91 100644
--- a/modules/processing.py
+++ b/modules/processing.py
@@ -170,6 +170,7 @@ class StableDiffusionProcessing():
 
         # Create another latent image, this time with a masked version of the original input.
         # Smoothly interpolate between the masked and unmasked latent conditioning image using a parameter.
+        conditioning_mask = conditioning_mask.to(source_image.device).to(source_image.dtype)
         conditioning_image = torch.lerp(
             source_image,
             source_image * (1.0 - conditioning_mask),