diff --git a/reflex/event.py b/reflex/event.py
index 6da5f995a..6cc15cbba 100644
--- a/reflex/event.py
+++ b/reflex/event.py
@@ -1345,8 +1345,8 @@ def check_fn_match_arg_spec(
         EventFnArgMismatch: Raised if the number of mandatory arguments do not match
     """
     user_args = inspect.getfullargspec(user_func).args
-    # Drop the first argument if it's a method
-    if inspect.ismethod(user_func):
+    # Drop the first argument if it's a bound method
+    if inspect.ismethod(user_func) and user_func.__self__ is not None:
         user_args = user_args[1:]
 
     user_default_args = inspect.getfullargspec(user_func).defaults