diff --git a/Code/Module/Theme_info.php b/Code/Module/Theme_info.php
index 24fb10418..b11bd6036 100644
--- a/Code/Module/Theme_info.php
+++ b/Code/Module/Theme_info.php
@@ -38,7 +38,7 @@ class Theme_info extends Controller
             // unfortunately there will be no translation for this string
             $desc = $info['description'];
             $version = $info['version'];
-            $credits = $info['credits'];
+            $credits = $info['credits'] ?? '';
         } else {
             $desc = '';
             $version = '';