1 files changed, 1 insertions, 1 deletions

diff --git a/manual/advanced_topics/main.tex b/manual/advanced_topics/main.tex
index 92dddb33db..7025282fe9 100755
--- a/manual/advanced_topics/main.tex
+++ b/manual/advanced_topics/main.tex
@@ -196,7 +196,7 @@ file find the instructions on the Rockbox website:
   }
 
   Only the first two parameters \emph{have} to be specified, the others can
-  be omitted using `-' as a placeholder. The syntax is very similar to WPS
+  be omitted using `$-$' as a placeholder. The syntax is very similar to WPS
   viewports (see \reference{ref:Viewports}).  Briefly:
 
   \nopt{lcd_non-mono}{\input{advanced_topics/viewports/mono-uivp-syntax.tex}}