diff --git a/doc/src/week41/week41.do.txt b/doc/src/week41/week41.do.txt
index 566b95aa5..f5a262b2a 100644
--- a/doc/src/week41/week41.do.txt
+++ b/doc/src/week41/week41.do.txt
@@ -20,6 +20,10 @@ For a more in depth discussion on  neural networks we recommend Goodfellow et al
 * "Video on the back propagation algorithm":"https://www.youtube.com/watch?v=Ilg3gGewQ5U"
 
 
+!split
+===== Review of the back propagation algorithm =====
+
+
 !split
 ===== Setting up the Back propagation algorithm =====