diff --git a/doc/source/user_guide/numpy_images.txt b/doc/source/user_guide/numpy_images.txt
index 5bba5da0..46f21afa 100644
--- a/doc/source/user_guide/numpy_images.txt
+++ b/doc/source/user_guide/numpy_images.txt
@@ -131,6 +131,7 @@ the grayscale image above:
 
 
 .. _numpy-images-coordinate-conventions:
+
 Coordinate conventions
 ----------------------