diff --git a/app/extensions/extension_copy.php b/app/extensions/extension_copy.php
index 48da410a35..51821110ac 100644
--- a/app/extensions/extension_copy.php
+++ b/app/extensions/extension_copy.php
@@ -141,6 +141,14 @@ else {
 	$db->exec(check_sql($sql));
 	unset($sql);
 
+//synchronize configuration
+	if (is_writable($_SESSION['switch']['extensions']['dir'])) {
+		require_once "app/extensions/resources/classes/extension.php";
+		$ext = new extension;
+		$ext->xml();
+		unset($ext);
+	}
+
 //redirect the user
 	require_once "includes/header.php";
 	echo "<meta http-equiv=\"refresh\" content=\"2;url=extensions.php\">\n";
diff --git a/app/extensions/extension_edit.php b/app/extensions/extension_edit.php
index 8d280d2fd2..98d4753a4a 100644
--- a/app/extensions/extension_edit.php
+++ b/app/extensions/extension_edit.php
@@ -514,7 +514,7 @@ if (count($_POST)>0 && strlen($_POST["persistformvar"]) == 0) {
 			if (permission_exists('extension_add') || permission_exists('extension_edit')) {
 
 				//synchronize configuration
-					if (is_readable($_SESSION['switch']['extensions']['dir'])) {
+					if (is_writable($_SESSION['switch']['extensions']['dir'])) {
 						require_once "app/extensions/resources/classes/extension.php";
 						$ext = new extension;
 						$ext->xml();