db.php

diff --git a/lib/php/db.php b/lib/php/db.php
index f12468fbdfe1bd1ff385bad7c17b7dfa08933652..73880cd1a76b66201a0d9f5c480d43f390540db8 100644 (file)
--- a/lib/php/db.php
+++ b/lib/php/db.php
@@ -349,7 +349,7 @@ FROM pg_catalog.pg_attribute a WHERE a.attrelid = (SELECT c.oid FROM pg_catalog.
       .'<div class="buttons">'
       .'<input type="submit" />'
       .'<input type="reset" />'
-      .'<input type="button" onclick="document.location=document.referrer" value="Cancel" />'
+      .($_SERVER['HTTP_REFERER'] ? '<input type="button" onclick="document.location=document.referrer" value="Cancel" />' : '')
       .'</div>'
     .PHP_EOL;