diff --git a/bin/service/websrv_lib.py b/bin/service/websrv_lib.py
index c89bcee7fa2..13ba6cd6e95 100644
--- a/bin/service/websrv_lib.py
+++ b/bin/service/websrv_lib.py
@@ -265,6 +265,8 @@ class MultiHTTPHandler(FixSendError, HttpOptions, BaseHTTPRequestHandler):
             try:
                 self.sec_realms[auth_provider.realm].checkRequest(fore,path)
             except AuthRequiredExc,ae:
+                # Darwin 9.x.x webdav clients will report "HTTP/1.0" to us, while they support (and need) the
+                # authorisation features of HTTP/1.1 
                 if self.request_version != 'HTTP/1.1' and ('Darwin/9.' not in fore.headers.get('User-Agent', '')):
                     self.log_error("Cannot require auth at %s", self.request_version)
                     self.send_error(403)