diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 4a011e87..63578295 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -951,7 +951,6 @@ GAMS:
 
 GAP:
   type: programming
-  lexer: GAP
   extensions:
   - .g
   - .gap