diff --git a/mm/filemap.c b/mm/filemap.c
index 0b301103ea80e..f4d2971abd7c6 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2545,7 +2545,7 @@ vm_fault_t filemap_fault(struct vm_fault *vmf)
 		put_page(page);
 		goto retry_find;
 	}
-	VM_BUG_ON_PAGE(page->index != offset, page);
+	VM_BUG_ON_PAGE(page_to_pgoff(page) != offset, page);
 
 	/*
 	 * We have a locked page in the page cache, now we need to check