diff --git a/src/diffusers/image_processor.py b/src/diffusers/image_processor.py
index 8738ff49fa0f..d58bd9e3e375 100644
--- a/src/diffusers/image_processor.py
+++ b/src/diffusers/image_processor.py
@@ -569,7 +569,7 @@ def preprocess(
 
             channel = image.shape[1]
             # don't need any preprocess if the image is latents
-            if channel == self.vae_latent_channels:
+            if channel == self.config.vae_latent_channels:
                 return image
 
             height, width = self.get_default_height_width(image, height, width)