diff --git a/identify/extensions.py b/identify/extensions.py
index 417650f..12a3343 100644
--- a/identify/extensions.py
+++ b/identify/extensions.py
@@ -151,6 +151,7 @@
     'md': {'text', 'markdown'},
     'mdx': {'text', 'mdx'},
     'meson': {'text', 'meson'},
+    'metal': {'text', 'metal'},
     'mib': {'text', 'mib'},
     'mjs': {'text', 'javascript'},
     'mk': {'text', 'makefile'},