diff --git a/.gitignore b/.gitignore
index 96cd2fad5799..6b57f5ed90f6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -182,6 +182,9 @@ MANIFEST.srt
 # generated by the top level install.html target. XXX Why does it need this?
 /vms/README_vms.pod
 
+# generated be ext/re/Makefile
+ext/re/invlist_inline.h
+
 # ctags
 tags
 TAGS