diff --git a/automaton.pdf b/automaton.pdf
index 4c4775e..f00c568 100644
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diff --git a/content/chapters/part2/1.tex b/content/chapters/part2/1.tex
index 8230131..abb3f86 100644
--- a/content/chapters/part2/1.tex
+++ b/content/chapters/part2/1.tex
@@ -167,7 +167,7 @@
 		\State $z = \begin{pmatrix} S_{1}[i-1] \\ \varepsilon \end{pmatrix} \circ z$
 		\ElsIf {$j > 0$}
 		\State $z = $ \Call{BacktrackRecurse}{$S_{1}$, $S_{2}$, $M$, $i$, $j-1$}
-		\State $z = \begin{pmatrix} S_{1}[i-1] \\ \varepsilon \end{pmatrix} \circ z$
+		\State $z = \begin{pmatrix} \varepsilon \\ S_{2}[j-1] \end{pmatrix} \circ z$
 		\Else
 		\State \Return []
 		\EndIf
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