diff --git a/openflow_input/nicira_role b/openflow_input/nicira_role
index f451d42..0df8742 100644
--- a/openflow_input/nicira_role
+++ b/openflow_input/nicira_role
@@ -27,7 +27,7 @@
 
 #version 1
 
-enum ofp_nicira_controller_role {
+enum ofp_nicira_controller_role(wire_type=uint32_t) {
    NX_ROLE_OTHER = 0,
    NX_ROLE_MASTER = 1,
    NX_ROLE_SLAVE = 2,