diff --git a/lib/hx509/Makefile.am b/lib/hx509/Makefile.am
index 53b865473..c98564eb6 100644
--- a/lib/hx509/Makefile.am
+++ b/lib/hx509/Makefile.am
@@ -334,7 +334,6 @@ EXTRA_DIST = \
 	data/proxy10-test.key \
 	data/revoke.crt \
 	data/revoke.key \
-	data/serial \
 	data/sf-class2-root.pem \
 	data/static-file \
 	data/sub-ca.crt \