diff --git a/ycmd/completers/language_server/language_server_completer.py b/ycmd/completers/language_server/language_server_completer.py
index 3310500229..e7f78f2bbf 100644
--- a/ycmd/completers/language_server/language_server_completer.py
+++ b/ycmd/completers/language_server/language_server_completer.py
@@ -3690,7 +3690,7 @@ def CollectApplyEdit( self, request, connection ):
 
 class WatchdogHandler( PatternMatchingEventHandler ):
   def __init__( self, server, patterns ):
-    super().__init__( patterns )
+    super().__init__( patterns=patterns )
     self._server = server