diff --git a/muc.js b/muc.js
index 4eb1b8909..e4d3ac7a3 100644
--- a/muc.js
+++ b/muc.js
@@ -239,6 +239,8 @@ Strophe.addConnectionPlugin('emuc', {
                     formsubmit.c('x', {xmlns: 'jabber:x:data', type: 'submit'});
                     formsubmit.c('field', {'var': 'FORM_TYPE'}).c('value').t('http://jabber.org/protocol/muc#roomconfig').up().up();
                     formsubmit.c('field', {'var': 'muc#roomconfig_roomsecret'}).c('value').t(key).up().up();
+                    // Fixes a bug in prosody 0.9.+ https://code.google.com/p/lxmppd/issues/detail?id=373
+                    formsubmit.c('field', {'var': 'muc#roomconfig_whois'}).c('value').t('anyone').up().up();
                     // FIXME: is muc#roomconfig_passwordprotectedroom required?
                     this.connection.sendIQ(formsubmit,
                         function (res) {