diff --git a/inputs/tutorial_15.tex b/inputs/tutorial_15.tex
index 2da6ab1..b3b0051 100644
--- a/inputs/tutorial_15.tex
+++ b/inputs/tutorial_15.tex
@@ -82,4 +82,4 @@ Consider the basic open set
 \{\cF \in  \beta\N  : \cF \ni f^{-1}(V)\}.
 \]
 
-% TODO
+\todo{I missed the last 5 minutes}