diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index f2ee9b2..f5a6695 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -135,7 +135,7 @@
 
 extern void get_page_state(struct page_state *ret);
 extern void get_full_page_state(struct page_state *ret);
-extern unsigned long __read_page_state(unsigned offset);
+extern unsigned long __read_page_state(unsigned long offset);
 extern void __mod_page_state(unsigned long offset, unsigned long delta);
 
 #define read_page_state(member) \