diff --git a/bin/service/websrv_lib.py b/bin/service/websrv_lib.py
index e9d7bafdf12..b0dd0aa8d21 100644
--- a/bin/service/websrv_lib.py
+++ b/bin/service/websrv_lib.py
@@ -229,7 +229,7 @@ class MultiHTTPHandler(FixSendError,BaseHTTPRequestHandler):
                 return
         mname = 'do_' + fore.command
         if not hasattr(fore, mname):
-            fore.send_error(501, "Unsupported method (%r)" % fore.command)
+            self.send_error(501, "Unsupported method (%r)" % fore.command)
             return
         fore.close_connection = 0
         method = getattr(fore, mname)