diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 58fcc76a..11338b90 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -56,6 +56,7 @@ Ada:
   type: programming
   color: "#02f88c"
   primary_extension: .adb
+  extensions:
   - .ads
 
 ApacheConf: