diff --git a/contrib/ext_manager/theme.php b/contrib/ext_manager/theme.php
index 3736350c..6faaace8 100644
--- a/contrib/ext_manager/theme.php
+++ b/contrib/ext_manager/theme.php
@@ -11,7 +11,7 @@ class ExtManagerTheme extends Themelet {
 			$ext_name = $extension["ext_name"];
 			$h_name = empty($extension["name"]) ? $ext_name : html_escape($extension["name"]);
 			$h_email = html_escape($extension["email"]);
-			$h_link = html_escape($extension["link"]);
+			$h_link = isset($extension["link"]) ? html_escape($extension["link"]) : "";
 			$h_author = html_escape($extension["author"]);
 			$h_description = html_escape($extension["description"]);
 			$h_enabled = $extension["enabled"] ? " checked='checked'" : "";