diff --git a/zerver/forms.py b/zerver/forms.py
index f96a0a3a90..f79a4b2c48 100644
--- a/zerver/forms.py
+++ b/zerver/forms.py
@@ -174,7 +174,6 @@ class RegistrationForm(RealmDetailsForm):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
         # Since the superclass doesn't except random extra kwargs, we
         # remove it from the kwargs dict before initializing.
-        self.realm_creation = kwargs["realm_creation"]
         self.realm = kwargs.pop("realm", None)
 
         super().__init__(*args, **kwargs)