diff --git a/testing/scripts/recipes/013_strongswan.mk b/testing/scripts/recipes/013_strongswan.mk
index 221f4f312..0bcf0ac66 100644
--- a/testing/scripts/recipes/013_strongswan.mk
+++ b/testing/scripts/recipes/013_strongswan.mk
@@ -70,6 +70,7 @@ CONFIG_OPTS = \
 	--enable-socket-dynamic \
 	--enable-dhcp \
 	--enable-farp \
+	--enable-connmark \
 	--enable-addrblock \
 	--enable-ctr \
 	--enable-ccm \