diff --git a/text/problem/main.tex b/text/problem/main.tex
index 2b90772..585f426 100644
--- a/text/problem/main.tex
+++ b/text/problem/main.tex
@@ -1,4 +1,4 @@
-\chapter{Landmark Privacy}
+\chapter{{\Thething} privacy}
 \label{ch:lmdk-prv}
 
 % Crowdsensing applications