diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 70f702c7..86aeb997 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -799,6 +799,7 @@ Tcsh:
   - .csh
 
 TeX:
+  type: markup
   extensions:
   - .tex
   - .sty