diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index bfabaf9..72b6ff3 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -37,6 +37,7 @@
 
 #include <linux/config.h>
 #include <linux/module.h>
+#include <linux/capability.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>