diff --git a/secondcw/cw/cw.tex b/secondcw/cw/cw.tex
index f5b43f0..b4b8e73 100644
--- a/secondcw/cw/cw.tex
+++ b/secondcw/cw/cw.tex
@@ -51,7 +51,7 @@
 \begin{document}
 	\section*{1}
 	\subsection*{1.1}
-		The file ag01598_6644818_1.1.spdl contains the base model of protocol$\PI$.
+		The file ag01598_6644818_1.1.spdl contains the base model of protocol$\Pi$.
 
 		I choose the names of the roles based on their functions since it would make the file more readable so R is Phone, S is Application, N is Network.