diff --git a/usr.bin/kdump/mkioctls b/usr.bin/kdump/mkioctls
index d1e7bea08e7c..6a0a67339bdd 100644
--- a/usr.bin/kdump/mkioctls
+++ b/usr.bin/kdump/mkioctls
@@ -49,6 +49,7 @@ BEGIN {
 	print "#include <netatm/atm_sap.h>"
 	print "#include <netatm/atm_sys.h>"
 	print "#include <netinet/in.h>"
+	print "#include <netinet/ip.h>"
 	print "#include <netinet/ip_mroute.h>"
 	print "#include <netinet6/in6_var.h>"
 	print "#include <netinet6/nd6.h>"