diff --git a/src/PIL/ImageChops.py b/src/PIL/ImageChops.py
index 378715d24..b1f71b5e7 100644
--- a/src/PIL/ImageChops.py
+++ b/src/PIL/ImageChops.py
@@ -108,7 +108,7 @@ def multiply(image1, image2):
 
     If you multiply an image with a solid black image, the result is black. If
     you multiply with a solid white image, the image is unaffected. At least
-    one of the images must be "1" mode.
+    one of the images must have mode "1".
 
     .. code-block:: python