diff --git a/src/yunohost/domain.py b/src/yunohost/domain.py
index c51039559..f28753311 100644
--- a/src/yunohost/domain.py
+++ b/src/yunohost/domain.py
@@ -103,6 +103,9 @@ def domain_add(operation_logger, domain, dyndns=False):
     if domain.startswith("xmpp-upload."):
         raise YunohostError("domain_cannot_add_xmpp_upload")
 
+    if domain.startswith("muc."):
+        raise YunohostError("domain_cannot_add_muc_upload")
+
     ldap = _get_ldap_interface()
 
     try: