diff --git a/src/Alias.php b/src/Alias.php
index c77be4a..7a9d785 100644
--- a/src/Alias.php
+++ b/src/Alias.php
@@ -184,7 +184,7 @@ class Alias
 
             //If it doesn't exist, skip it
             if (!class_exists($root) && !interface_exists($root)) {
-                $this->error("Class $this->root is not found.");
+                $this->error("Class $root is not found.");
                 return;
             }