diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index d3dcb9e9..af0472c8 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -2212,6 +2212,8 @@ Perl6:
   - .pm
   - .pm6
   - .t
+  filenames:
+  - Rexfile
   interpreters:
   - perl6
   tm_scope: none