diff --git a/runoff.list b/runoff.list
index e8884e0..73d39f7 100644
--- a/runoff.list
+++ b/runoff.list
@@ -23,7 +23,6 @@ proc.h
 proc.c
 swtch.S
 kalloc.c
-data.S
 
 # system calls
 traps.h