diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 57a0387b..d6d5f74c 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -793,7 +793,6 @@ LLVM:
 Lasso:
   type: programming
   lexer: Lasso
-  ace_mode: lasso
   color: "#2584c3"
   primary_extension: .lasso
 
@@ -801,7 +800,6 @@ Less:
   type: markup
   group: CSS
   lexer: CSS
-  ace_mode: less
   primary_extension: .less
 
 LilyPond: