diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index ddcd844c..85920324 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -547,7 +547,7 @@ D-ObjDump:
 
 DIGITAL Command Language:
   type: programming
-  lexer: DCL
+  lexer: Text only
   search_term: dcl
   group: OpenVMS
   aliases:
@@ -1478,7 +1478,7 @@ Mirah:
 
 Module Management System:
   type: programming
-  lexer: MMS
+  lexer: Text only
   search_term: mms
   group: OpenVMS
   extensions: