diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index c5d39a0f..bb62beb3 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -491,6 +491,7 @@ Gettext Catalog:
 Glyph:
   type: programming
   color: "#e4cc98"
+  lexer: Tcl
   primary_extension: .glf
 
 Go: