diff --git a/class_management.php b/class_management.php
index d940ea8..6491d4c 100755
--- a/class_management.php
+++ b/class_management.php
@@ -98,10 +98,14 @@ class PhpObject
 	{
 		$this->resetMessageStack();
 		$this->setDebug($bDebug);
-		$this->iExtractMode = $iExtractMode;
+		$this->setExtractMode($iExtractMode);
 		$this->sChildClass = $sClass;
 	}
 	
+	public function setExtractMode($iExtractMode) {
+		$this->iExtractMode = $iExtractMode;
+	}
+	
 	/* private function, use Settings::DEBUG for global setting */
 	private function setDebug($bDebug)
 	{