diff --git a/proto/static/config.Y b/proto/static/config.Y
index 7b282898..f1825edf 100644
--- a/proto/static/config.Y
+++ b/proto/static/config.Y
@@ -95,6 +95,8 @@ stat_nexthop:
   }
   | stat_nexthop ONLINK bool {
     this_snh->onlink = $3;
+    if (this_snh->use_bfd && this_snh->onlink)
+      cf_error("Options 'bfd' and 'onlink' cannot be combined");
   }
   | stat_nexthop WEIGHT expr {
     this_snh->weight = $3 - 1;
@@ -102,6 +104,8 @@ stat_nexthop:
   }
   | stat_nexthop BFD bool {
     this_snh->use_bfd = $3; cf_check_bfd($3);
+    if (this_snh->use_bfd && this_snh->onlink)
+      cf_error("Options 'bfd' and 'onlink' cannot be combined");
   }
 ;