diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 6e26adc08f14..ec85c37dcfb9 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -86,7 +86,7 @@ void put_page_bootmem(struct page *page)
 
 }
 
-void register_page_bootmem_info_section(unsigned long start_pfn)
+static void register_page_bootmem_info_section(unsigned long start_pfn)
 {
 	unsigned long *usemap, mapsize, section_nr, i;
 	struct mem_section *ms;