diff --git a/main.tex b/main.tex
index 329e6cc..06be589 100644
--- a/main.tex
+++ b/main.tex
@@ -97,6 +97,9 @@
     \bookmarksetup{startatroot}%
 }
 
+\newcommand{\labelprefix}{main}
+\newcommand{\sublabel}[1]{\label{sec:\labelprefix:#1}}
+
 
 %% Document
 \begin{document}