diff --git a/w04_model_free_control/t04_sarsa.tex b/w04_model_free_control/t04_sarsa.tex
index 0515a5a..4ee73e8 100644
--- a/w04_model_free_control/t04_sarsa.tex
+++ b/w04_model_free_control/t04_sarsa.tex
@@ -103,7 +103,7 @@
 	\begin{itemize}
 		\item Initialization:
 		\begin{itemize}
-			\item $Q(s,a). \forall s \in S, a \in A$
+			\item $Q(s,a)=0. \forall s \in S, a \in A$
 			\item $t=0$
 			\item initial state $s_t = s_0$
 		\end{itemize}