diff --git a/.gitattributes b/.gitattributes
index a472dba..fcba3ba 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,3 +1,5 @@
+hio/ac/* linguist-generated=true
+hio/m4/* linguist-generated=true
 mio/ac/* linguist-generated=true
 mio/m4/* linguist-generated=true
 stio/ac/* linguist-generated=true