diff --git a/src/quart/app.py b/src/quart/app.py
index a25933c..6e554ad 100644
--- a/src/quart/app.py
+++ b/src/quart/app.py
@@ -645,7 +645,7 @@ def add_websocket(
             def websocket_route():
                 ...
 
-            app.add_websocket('/', websocket_route)
+            app.add_websocket('/', view_func=websocket_route)
 
         Arguments:
             rule: The path to route on, should start with a ``/``.