diff --git a/src/vnet/ip/ip.api b/src/vnet/ip/ip.api
index f244480..5371696 100644
--- a/src/vnet/ip/ip.api
+++ b/src/vnet/ip/ip.api
@@ -116,7 +116,7 @@
 */
 define ip_neighbor_details {
     u32 context;
-    u32 is_static;
+    u8  is_static;
     u8  is_ipv6;
     u8  mac_address[6];
     u8  ip_address[16];