diff --git a/examples/gnrc_border_router/Makefile.cdc-ecm.conf b/examples/gnrc_border_router/Makefile.cdc-ecm.conf
index 8c86a6afbc89..74d7451619f9 100644
--- a/examples/gnrc_border_router/Makefile.cdc-ecm.conf
+++ b/examples/gnrc_border_router/Makefile.cdc-ecm.conf
@@ -4,6 +4,7 @@ USEMODULE += usbus_cdc_ecm
 
 ifeq (dhcpv6,$(PREFIX_CONF))
   FLAGS_EXTRAS += --use-dhcpv6
+  STATIC_ROUTES ?= 1
 else ifeq (auto_subnets,$(PREFIX_CONF))
   FLAGS_EXTRAS += --use-radvd
 endif