diff --git a/install/lib/installer_base.lib.php b/install/lib/installer_base.lib.php
index 942d03f4fa5f432b7f5bed7c4b20f693657c7d2d..15f3851906e2e3dc0ab2cc0f7b8b9bc88c4f6ade 100644
--- a/install/lib/installer_base.lib.php
+++ b/install/lib/installer_base.lib.php
@@ -190,7 +190,7 @@ class installer_base {
 		$jk_init = $cf['jk_init'];
 		$jk_chrootsh = $cf['jk_chrootsh'];
 		
-		if (!is_dir($config_dir))
+		if (is_dir($config_dir))
 		{
 			copy($config_dir.'/'.$jk_init, $config_dir.'/'.$jk_init.'~');
 			copy($config_dir.'/'.$jk_chrootsh.".master", $config_dir.'/'.$jk_chrootsh.'~');