diff --git a/testing/scripts/recipes/013_strongswan.mk b/testing/scripts/recipes/013_strongswan.mk
index 0bcf0ac66c..d58de95bf1 100644
--- a/testing/scripts/recipes/013_strongswan.mk
+++ b/testing/scripts/recipes/013_strongswan.mk
@@ -71,6 +71,7 @@ CONFIG_OPTS = \
 	--enable-dhcp \
 	--enable-farp \
 	--enable-connmark \
+	--enable-forecast \
 	--enable-addrblock \
 	--enable-ctr \
 	--enable-ccm \