diff --git a/doc/latexuguide/twiss.tex b/doc/latexuguide/twiss.tex
index 66eb27521..7d13a57b3 100644
--- a/doc/latexuguide/twiss.tex
+++ b/doc/latexuguide/twiss.tex
@@ -137,7 +137,7 @@ \chapter{Twiss Module}
   \ttitem{SECTORACC} a logical flag to save composition of maps instead of individual maps of a
   \hyperref[sec:sectormap]{sector map}.
 
-  \item{SECTORPURE} a logical flag to save the transfer map Rij without effects from higher order map (Tijk). This option should be used to get it in the correct format for TRAIN.
+  \ttitem{SECTORPURE} a logical flag to save the transfer map Rij without effects from higher order map (Tijk). This option should be used to get it in the correct format for TRAIN.
 
   \ttitem{SECTORTABLE} the name of the table containing the \texttt{SECTORMAP}
   values. The elements (lines) and parameters (columns)