diff --git a/manual/appendix/wps_tags.tex b/manual/appendix/wps_tags.tex
index 51f10e9a32..549d394258 100644
--- a/manual/appendix/wps_tags.tex
+++ b/manual/appendix/wps_tags.tex
@@ -691,7 +691,7 @@ display cycling round the defined sublines. See
     \item[setting\_set] -- Set the subsequently specified setting to a specific value (e.g
       \config{\%T(0,0,32,32, setting\_set, volume, 0)} sets the volume to 0).
     \item[lock] -- Soft locks the touchscreen.  All touch areas are disabled except for
-        areas with the lock action or ones that have the allow_while_locked option (see below).
+        areas with the lock action or ones that have the allow\_while\_locked option (see below).
   \end{description}
   Any (or muliple) of the following options can be used after the action is specified
   \subsection{Options}