diff --git a/docs/latex/wx/sysopt.tex b/docs/latex/wx/sysopt.tex
index 502b957bc6..1f8dd969c8 100644
--- a/docs/latex/wx/sysopt.tex
+++ b/docs/latex/wx/sysopt.tex
@@ -45,8 +45,8 @@ used if wider fonts selection is more important than higher quality.}
 \twocolitem{{\bf Option}}{{\bf Value}}
 \twocolitem{gtk.window.force-background-colour}{If 1, the backgrounds of windows with the wxBG\_STYLE\_COLOUR background style are cleared forcibly instead
 of relying on the underlying GTK+ window colour. This works around a display problem when running applications under KDE with the gtk-qt theme installed (0.6 and below).}
-\twocolitem{sizer.desktopmargin.x}{The horizontal margin to subtract from the desktop size when Xinerama is not available.}
-\twocolitem{sizer.desktopmargin.y}{The vertical margin to subtract from the desktop size when Xinerama is not available.}
+\twocolitem{gtk.desktopmargin.x}{The horizontal margin to subtract from the desktop size when Xinerama is not available.}
+\twocolitem{gtk.desktopmargin.y}{The vertical margin to subtract from the desktop size when Xinerama is not available.}
 \end{twocollist}
 
 \wxheading{Mac}