diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index dd26e1bb7222335bdb1e6943480eb40af4f325d7..861995c7fc3fd90cc3bcc9502e080d64a8bb1157 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -61,7 +61,6 @@
 #include <linux/cpuset.h>
 #include <linux/proc_ns.h>
 #include <linux/nsproxy.h>
-#include <linux/proc_ns.h>
 #include <net/sock.h>
 
 /*