diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 4196a51..6ea935f 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -1,6 +1,7 @@
 #ifndef __LINUX_NETFILTER_H
 #define __LINUX_NETFILTER_H
 
+#include <linux/types.h>
 
 /* Responses from hook functions. */
 #define NF_DROP 0
diff --git a/include/linux/netfilter_ipv4/ip_tables.h b/include/linux/netfilter_ipv4/ip_tables.h
index fc64b97..c42c73f 100644
--- a/include/linux/netfilter_ipv4/ip_tables.h
+++ b/include/linux/netfilter_ipv4/ip_tables.h
@@ -15,6 +15,7 @@
 #ifndef _IPTABLES_H
 #define _IPTABLES_H
 
+#include <linux/types.h>
 #include <linux/netfilter_ipv4.h>
 
 #include <linux/netfilter/x_tables.h>
diff --git a/include/linux/netfilter_ipv6/ip6_tables.h b/include/linux/netfilter_ipv6/ip6_tables.h
index 68b22fc..fb03b31 100644
--- a/include/linux/netfilter_ipv6/ip6_tables.h
+++ b/include/linux/netfilter_ipv6/ip6_tables.h
@@ -15,6 +15,7 @@
 #ifndef _IP6_TABLES_H
 #define _IP6_TABLES_H
 
+#include <linux/types.h>
 #include <linux/netfilter_ipv6.h>
 
 #include <linux/netfilter/x_tables.h>