docs: fix syntax in riverctl man page

 doc/riverctl.1.scd | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/riverctl.1.scd b/doc/riverctl.1.scd
index f0ab55e..fefc7a8 100644
--- a/doc/riverctl.1.scd
+++ b/doc/riverctl.1.scd
@@ -21,7 +21,7 @@ over the Wayland protocol.
 	Close the focused view.
 
 *csd-filter-add* _app-id_
-	Add _app_id_ to the CSD filter list. Views with this _app_id are
+	Add _app-id_ to the CSD filter list. Views with this _app-id_ are
 	told to use client side decoration instead of the default server
 	side decoration.