diff --git a/mm/internal.h b/mm/internal.h
index 85004f5..17256bb 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -26,3 +26,5 @@
 #endif /* CONFIG_MMU */
 }
 
+extern void fastcall __init __free_pages_bootmem(struct page *page,
+						unsigned int order);