diff --git a/Documentation/dontdiff b/Documentation/dontdiff
index 881e6dd03aea..27809357da58 100644
--- a/Documentation/dontdiff
+++ b/Documentation/dontdiff
@@ -5,6 +5,8 @@
 *.css
 *.dvi
 *.eps
+*.fw.gen.S
+*.fw
 *.gif
 *.grep
 *.grp