diff --git a/gas/doc/.Sanitize b/gas/doc/.Sanitize
index 18b890e49c6..17f8aff0aaa 100644
--- a/gas/doc/.Sanitize
+++ b/gas/doc/.Sanitize
@@ -31,6 +31,7 @@ as.1
 as.texinfo
 gasp.texi
 h8.texi
+internals.texi
 
 Things-to-lose: