diff --git a/buttons/Makefile b/buttons/Makefile
index 28d269f..ce2423e 100644
--- a/buttons/Makefile
+++ b/buttons/Makefile
@@ -1,5 +1,5 @@
 FILES = about.png events.png gitweb.png gopher.png home.png library.png \
 	mailman.png media.png office.png services.png stats.png webmail.png \
-	wiki.png
+	wiki.png valid-atom.png
 RELDIR = buttons/
 include ../common.mk