--- a/taskcluster/ci/source-test/mozlint.yml
+++ b/taskcluster/ci/source-test/mozlint.yml
@@ -75,16 +75,30 @@ eslint:
             - '**/*.xml'
             # Run when eslint policies change.
             - '**/.eslintignore'
             - '**/*eslintrc*'
             # The plugin implementing custom checks.
             - 'tools/lint/eslint/eslint-plugin-mozilla/**'
             - 'tools/lint/eslint/eslint-plugin-spidermonkey-js/**'
 
+mingw-cap:
+    description: lint for MinGW Capitalization issues
+    platform: lint/opt
+    treeherder:
+        symbol: mingw
+    run:
+        mach: lint -l mingw-capitalization -f treeherder
+    when:
+        files-changed:
+            - '**/*.cpp'
+            - '**/*.cc'
+            - '**/*.c'
+            - '**/*.h'
+
 py-compat:
     description: lint for python 2/3 compatibility issues
     platform: lint/opt
     treeherder:
         symbol: py-compat
     run:
         mach: lint -l py2 -l py3 -f treeherder
     when: