diff --git a/dp-core/vr_nexthop.c b/dp-core/vr_nexthop.c
index 42709c68c..764e729a4 100644
--- a/dp-core/vr_nexthop.c
+++ b/dp-core/vr_nexthop.c
@@ -53,7 +53,7 @@ vrouter_get_nexthop(unsigned int rid, unsigned int index)
     router = vrouter_get(rid);
     nh = __vrouter_get_nexthop(router, index);
     if (nh)
-        nh->nh_users++;
+        (void)__sync_add_and_fetch(&nh->nh_users, 1);
 
     return nh;
 }