use require_once for minifier

1 files changed, 1 insertions, 1 deletions

diff --git a/prefs.php b/prefs.php
index fcf21cf2e..6c203bd2a 100644
--- a/prefs.php
+++ b/prefs.php
@@ -64,7 +64,7 @@
 	<script type="text/javascript">
 		require({cache:{}});
 	<?php
-		require 'lib/jshrink/Minifier.php';
+		require_once 'lib/jshrink/Minifier.php';
 
 		foreach (PluginHost::getInstance()->get_plugins() as $n => $p) {
 			if (method_exists($p, "get_prefs_js")) {