diff --git a/conf/default.conf.php b/conf/default.conf.php
--- a/conf/default.conf.php
+++ b/conf/default.conf.php
@@ -1035,6 +1035,7 @@
     // '@\\.([^.]+)\\.bak$@' => 1,
 
     '@\.arcconfig$@' => 'js',
+    '@\.arclint$@' => 'js',
     '@\.divinerconfig$@' => 'js',
   ),
 
diff --git a/src/applications/config/option/PhabricatorSyntaxHighlightingConfigOptions.php b/src/applications/config/option/PhabricatorSyntaxHighlightingConfigOptions.php
--- a/src/applications/config/option/PhabricatorSyntaxHighlightingConfigOptions.php
+++ b/src/applications/config/option/PhabricatorSyntaxHighlightingConfigOptions.php
@@ -77,6 +77,7 @@
         'wild',
         array(
           '@\.arcconfig$@' => 'js',
+          '@\.arclint$@' => 'js',
           '@\.divinerconfig$@' => 'js',
         ))
         ->setSummary(