diff --git a/doc/guix.texi b/doc/guix.texi
index 7dfc68d4dc..bcc19a60da 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -11283,7 +11283,7 @@ configuration file.  It is used to pass extra text to be
 added verbatim to the configuration file.
 @end deffn
 
-@deffn {Scheme Procedure} screen-locker-service @var{package} [@var{name}]
+@deffn {Scheme Procedure} screen-locker-service @var{package} [@var{program}]
 Add @var{package}, a package for a screen-locker or screen-saver whose
 command is @var{program}, to the set of setuid programs and add a PAM entry
 for it.  For example: