diff --git a/include/linux/mm.h b/include/linux/mm.h
index 75e9f07..26e1663 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1051,5 +1051,7 @@
 void drop_pagecache(void);
 void drop_slab(void);
 
+extern int randomize_va_space;
+
 #endif /* __KERNEL__ */
 #endif /* _LINUX_MM_H */