diff --git a/doc/Wayland/Makefile.am b/doc/Wayland/Makefile.am
index 4de2f834..a7e1b548 100644
--- a/doc/Wayland/Makefile.am
+++ b/doc/Wayland/Makefile.am
@@ -64,7 +64,7 @@ Wayland: $(publican_targets)
 	$(AM_V_GEN)$(PUBLICAN) rename --name Wayland \
 		--version "$(WAYLAND_VERSION_MAJOR).$(WAYLAND_VERSION_MINOR)" \
 		--config $(builddir)/publican-copy.cfg
-	$(AM_V_GEN)$(PUBLICAN) build --quiet --lang en-US --format html,pdf \
+	$(AM_V_GEN)$(PUBLICAN) build --quiet --langs en-US --formats html,pdf \
 		--config $(builddir)/publican-copy.cfg
 	@touch Wayland