diff --git a/manual/luatex-fonts.tex b/manual/luatex-fonts.tex
index 136d20dd3..917147c55 100644
--- a/manual/luatex-fonts.tex
+++ b/manual/luatex-fonts.tex
@@ -788,7 +788,7 @@ Within reasonable bounds you can extend a font after
it has been defined. Becaus
  some properties are best left unchanged this is limited to adding
characters.

  \startfunctioncall
-font.addcharacters(<number n>, <table> f)
+font.addcharacters(<number> n, <table> f)
  \stopfunctioncall

  The table passed can have the fields \type {characters} which is a
(sub)table