diff --git a/lib/hx509/Makefile.am b/lib/hx509/Makefile.am
index 5d9ae4ca0..6ebceb2b9 100644
--- a/lib/hx509/Makefile.am
+++ b/lib/hx509/Makefile.am
@@ -256,6 +256,7 @@ EXTRA_DIST = \
 	data/kdc.crt \
 	data/kdc.key \
 	data/key.der \
+	data/key2.der \
 	data/nist-data \
 	data/no-proxy-test.crt \
 	data/no-proxy-test.key \