diff --git a/framework/yii/console/controllers/HelpController.php b/framework/yii/console/controllers/HelpController.php
index c1a8e0c74d3..bf97e908a84 100644
--- a/framework/yii/console/controllers/HelpController.php
+++ b/framework/yii/console/controllers/HelpController.php
@@ -129,7 +129,7 @@ protected function getModuleCommands($module)
 		$files = scandir($module->getControllerPath());
 		foreach ($files as $file) {
 			if (strcmp(substr($file, -14), 'Controller.php') === 0) {
-				$commands[] = $prefix . lcfirst(substr(basename($file), 0, -14));
+				$commands[] = $prefix . Inflector::camel2id(substr(basename($file), 0, -14));
 			}
 		}