diff --git a/src/lint/engine/ArcanistLintEngine.php b/src/lint/engine/ArcanistLintEngine.php
index a0bba72f..8ea1ef6a 100644
--- a/src/lint/engine/ArcanistLintEngine.php
+++ b/src/lint/engine/ArcanistLintEngine.php
@@ -61,6 +61,7 @@
 abstract class ArcanistLintEngine {
 
   protected $workingCopy;
+  protected $paths = array();
   protected $fileData = array();
 
   protected $charToLine = array();