diff --git a/.gitignore b/.gitignore
index 7eddc794..6c656d9a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -48,9 +48,11 @@ lib/chibi/process.c
 lib/chibi/stty.c
 lib/chibi/system.c
 lib/chibi/time.c
+lib/srfi/144/math.c
 *.tgz
 *.html
 *.img
+*.err
 *.fasl
 !index.html