diff --git a/demos/Makefile.am b/demos/Makefile.am
index f780869ead..024fcb3a75 100644
--- a/demos/Makefile.am
+++ b/demos/Makefile.am
@@ -3,7 +3,7 @@ include $(top_srcdir)/Makefile.decl
 
 SUBDIRS = gtk-demo widget-factory icon-browser
 
-EXTRA_DIST = \
+EXTRA_DIST += \
 	meson.build
 
 -include $(top_srcdir)/git.mk