diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index c9d0d352..644bb339 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -908,6 +908,7 @@ Perl:
   - .pl
   - .plx
   - .pm
+  - .pm6
   - .pod
   - .psgi
   - .t