diff --git a/library/think/console/command/optimize/Autoload.php b/library/think/console/command/optimize/Autoload.php
index 1fa28a44..93820c02 100644
--- a/library/think/console/command/optimize/Autoload.php
+++ b/library/think/console/command/optimize/Autoload.php
@@ -30,7 +30,7 @@ class Autoload extends Command
         $classmapFile = <<<EOF
 <?php
 /**
- * ThinkPHP 类库映射定义
+ * 类库映射
  */
  
 return [
@@ -42,6 +42,7 @@ EOF;
             'think\\'              => LIB_PATH . 'think',
             'behavior\\'           => LIB_PATH . 'behavior',
             'traits\\'             => LIB_PATH . 'traits',
+            ''                     => realpath(rtrim(EXTEND_PATH))
         ];
 
         krsort($namespacesToScan);
@@ -76,7 +77,7 @@ EOF;
         foreach ($this->createMap($dir, $namespace) as $class => $path) {
 
             $pathCode = $this->getPathCode($path) . ",\n";
-            
+
             if (!isset($classMap[$class])) {
                 $classMap[$class] = $pathCode;
             } elseif ($classMap[$class] !== $pathCode && !preg_match('{/(test|fixture|example|stub)s?/}i', strtr($classMap[$class] . ' ' . $path, '\\', '/'))) {
@@ -114,7 +115,6 @@ EOF;
         return $baseDir . (($path !== false) ? var_export($path, true) : "");
     }
 
-
     protected function normalizePath($path)
     {
         $parts    = [];
@@ -202,7 +202,6 @@ EOF;
         return $map;
     }
 
-
     protected function findClasses($path)
     {
         $extraTypes = '|trait';