diff --git a/exam/ex.tex b/exam/ex.tex
index 62951ed..49a9195 100644
--- a/exam/ex.tex
+++ b/exam/ex.tex
@@ -228,7 +228,8 @@
       long-term keys is $\unit[468]{bytes}$ (in memory) for the private key and
       $\unit[4488]{bytes}$ for the public key.
 
-    \item \TODO
+    \item Kyber512 is also a KEM and achieves the same level of (classical)
+      security.
 
     \item \TODO