diff --git a/buttons/Makefile b/buttons/Makefile
index f8d12ad..813a507 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 gallery.png valid-atom.png valid-css-blue.png valid-xhtml11-blue.png
+	wiki.png gallery.png
 RELDIR = buttons/
 include ../common.mk
diff --git a/buttons/valid-atom.png b/buttons/valid-atom.png
deleted file mode 100644
index acef9de..0000000
Binary files a/buttons/valid-atom.png and /dev/null differ
diff --git a/buttons/valid-css-blue.png b/buttons/valid-css-blue.png
deleted file mode 100644
index f022511..0000000
Binary files a/buttons/valid-css-blue.png and /dev/null differ
diff --git a/buttons/valid-css.png b/buttons/valid-css.png
deleted file mode 100644
index 9b2f596..0000000
Binary files a/buttons/valid-css.png and /dev/null differ
diff --git a/buttons/valid-xhtml11-blue.png b/buttons/valid-xhtml11-blue.png
deleted file mode 100644
index 88fefcb..0000000
Binary files a/buttons/valid-xhtml11-blue.png and /dev/null differ
diff --git a/buttons/valid-xhtml11.png b/buttons/valid-xhtml11.png
deleted file mode 100644
index 1529ac9..0000000
Binary files a/buttons/valid-xhtml11.png and /dev/null differ