diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index 8213f79b1..0ff754af8 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -3138,7 +3138,7 @@ def alpha_composite(im1, im2):
 def blend(im1, im2, alpha):
     """
     Creates a new image by interpolating between two input images, using
-    a constant alpha.::
+    a constant alpha::
 
         out = image1 * (1.0 - alpha) + image2 * alpha