diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 1fbc38b6..acf509d9 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -712,6 +712,7 @@ Lua:
   extensions:
   - .lua
   - .nse
+  - .pd_lua
 
 Makefile:
   extensions: