diff --git a/zebra/irdp_main.c b/zebra/irdp_main.c
index 9e31950..5ee50e7 100644
--- a/zebra/irdp_main.c
+++ b/zebra/irdp_main.c
@@ -41,6 +41,7 @@
 #include "if.h"
 #include "vty.h"
 #include "sockunion.h"
+#include "sockopt.h"
 #include "prefix.h"
 #include "command.h"
 #include "memory.h"