diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 94d1a9c9..521e8f05 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -822,6 +822,7 @@ Groovy:
   - .grt
   - .gtpl
   - .gvy
+  - .tpl
   interpreters:
   - groovy