diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index e7ec4af9..cc97d249 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -774,6 +774,7 @@ DNS zone:
   extensions:
   - .zone
   tm_scope: text.zone
+  ace_mode: text
 
 Dockerfile:
   type: data