diff --git a/openflow_input/bsn_get_interfaces b/openflow_input/bsn_get_interfaces
index ba1508c..01902bc 100644
--- a/openflow_input/bsn_get_interfaces
+++ b/openflow_input/bsn_get_interfaces
@@ -40,8 +40,8 @@
     of_mac_addr_t hw_addr;
     pad(2);
     of_port_name_t name;
-    uint32_t ipv4_addr;
-    uint32_t ipv4_netmask;
+    of_ipv4_t ipv4_addr;
+    of_ipv4_t ipv4_netmask;
 };
 
 struct of_bsn_get_interfaces_reply {