diff --git a/lib/doc/LFUNs.lyx b/lib/doc/LFUNs.lyx
index 4b201a728b..65d759eb98 100644
--- a/lib/doc/LFUNs.lyx
+++ b/lib/doc/LFUNs.lyx
@@ -722,7 +722,7 @@ Notion These properties are stored via LFUN_TEXTSTYLE_UPDATE,
 \end_layout
 
 \begin_layout Description
-Syntax textstyle-apply [<NUM>]textstyle-apply
+Syntax textstyle-apply [<NUM>]
 \end_layout
 
 \begin_layout Description