diff --git a/include/net/sock.h b/include/net/sock.h
index f2046e4..ebbc0ba 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -40,6 +40,7 @@
 #ifndef _SOCK_H
 #define _SOCK_H
 
+#include <linux/hardirq.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/list_nulls.h>