diff --git a/fs/proc/self.c b/fs/proc/self.c
index 21940d8..6b6a993 100644
--- a/fs/proc/self.c
+++ b/fs/proc/self.c
@@ -1,5 +1,6 @@
 #include <linux/sched.h>
 #include <linux/namei.h>
+#include <linux/slab.h>
 #include <linux/pid_namespace.h>
 #include "internal.h"