diff --git a/fs/file.c b/fs/file.c
index 2d479dd8484e..171f6b41b4cd 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -179,7 +179,7 @@ static struct fdtable * alloc_fdtable(unsigned int nr)
 	if (!data)
 		goto out_arr;
 	fdt->open_fds = data;
-	data += nr / BITS_PER_LONG;
+	data += nr / BITS_PER_BYTE;
 	fdt->close_on_exec = data;
 	fdt->next = NULL;