diff --git a/reflex/event.py b/reflex/event.py
index f0dc035c282..551dcdd0438 100644
--- a/reflex/event.py
+++ b/reflex/event.py
@@ -1269,7 +1269,7 @@ def call_script(
     Returns:
         EventSpec: An event that will execute the client side javascript.
     """
-    callback_kwargs = {}
+    callback_kwargs = {"callback": None}
     if callback is not None:
         callback_kwargs = {
             "callback": str(