diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index e57eb942..2037a56c 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -347,6 +347,7 @@ Diff:
 DM:
   type: programming
   color: "#075ff1"
+  lexer: Text only
   primary_extension: .dm
   aliases:
   - byond