diff --git a/webmin/third_chooser.cgi b/webmin/third_chooser.cgi
index 24310f4c6..8f8b4371d 100755
--- a/webmin/third_chooser.cgi
+++ b/webmin/third_chooser.cgi
@@ -2,6 +2,7 @@
 # third_chooser.cgi
 # Display a list of third-party modules for installation
 
+$trust_unknown_referers = 1;
 require './webmin-lib.pl';
 &popup_header($text{'third_title'});
 $mods = &list_third_modules();