diff --git a/src/vnet/ip/ip_api.c b/src/vnet/ip/ip_api.c
index ae4ee0c..e03b010 100644
--- a/src/vnet/ip/ip_api.c
+++ b/src/vnet/ip/ip_api.c
@@ -2119,10 +2119,10 @@
   /*
    * Mark the route add/del API as MP safe
    */
-  am->is_mp_safe[VL_API_IP_ROUTE_ADD_DEL] = 1;
-  am->is_mp_safe[VL_API_IP_ROUTE_ADD_DEL_REPLY] = 1;
-  am->is_mp_safe[VL_API_IP_ROUTE_ADD_DEL_V2] = 1;
-  am->is_mp_safe[VL_API_IP_ROUTE_ADD_DEL_V2_REPLY] = 1;
+  vl_api_set_msg_thread_safe (am, VL_API_IP_ROUTE_ADD_DEL, 1);
+  vl_api_set_msg_thread_safe (am, VL_API_IP_ROUTE_ADD_DEL_REPLY, 1);
+  vl_api_set_msg_thread_safe (am, VL_API_IP_ROUTE_ADD_DEL_V2, 1);
+  vl_api_set_msg_thread_safe (am, VL_API_IP_ROUTE_ADD_DEL_V2_REPLY, 1);
 
   /*
    * Set up the (msg_name, crc, message-id) table