diff --git a/password_required/forms.py b/password_required/forms.py
index 1a9383b..4eabb7b 100644
--- a/password_required/forms.py
+++ b/password_required/forms.py
@@ -23,7 +23,7 @@ class AuthenticationForm(forms.Form):
         super(AuthenticationForm, self).__init__(*args, **kwargs)
 
 
-    def clean(self):
+    def clean_password(self):
         """
         Validate that the password entered was correct.
         """