diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 4673d3e2..80bc55c5 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -493,6 +493,7 @@ Cirru:
 Clarion:
   type: programming
   color: #f29200
+  ace_mode: text
   extensions:
   - .clw
   - .inc