diff --git a/cs/kap04.tex b/cs/kap04.tex
index 4125561..57a6573 100644
--- a/cs/kap04.tex
+++ b/cs/kap04.tex
@@ -43,7 +43,7 @@ GhostScriptu, například takto:
 
 \begin{verbatim}
         gs -q -dNOPAUSE -dBATCH
-           -sDEVICE=pdfwrite -dPDFSETTINGS=/prepress
+           -sDEVICE=pdfwrite -dPDFSETTINGS=prepress
            -sOutputFile=vystup.pdf vstup.pdf
 \end{verbatim}