diff --git a/testing/scripts/recipes/013_strongswan.mk b/testing/scripts/recipes/013_strongswan.mk
index efa4a77e3..85f80fe5b 100644
--- a/testing/scripts/recipes/013_strongswan.mk
+++ b/testing/scripts/recipes/013_strongswan.mk
@@ -75,6 +75,7 @@ CONFIG_OPTS = \
 	--enable-unity \
 	--enable-unbound \
 	--enable-ipseckey \
+	--enable-dnscert \
 	--enable-cmd \
 	--enable-libipsec \
 	--enable-kernel-libipsec \