diff --git a/tools/lint/black.yml b/tools/lint/black.yml
index 4c0f8533cceb..c182f9939b20 100644
--- a/tools/lint/black.yml
+++ b/tools/lint/black.yml
@@ -10,6 +10,7 @@ black:
     extensions:
         - build
         - configure
+        - mozbuild
         - py
     support-files:
         - 'tools/lint/python/**'