diff --git a/awscli/customizations/ec2/decryptpassword.py b/awscli/customizations/ec2/decryptpassword.py
index afd601bb1c43..b948c7051f2d 100644
--- a/awscli/customizations/ec2/decryptpassword.py
+++ b/awscli/customizations/ec2/decryptpassword.py
@@ -80,8 +80,6 @@ def add_to_params(self, parameters, value):
             path = os.path.expanduser(path)
             if os.path.isfile(path):
                 self._key_path = path
-                endpoint_prefix = \
-                    self._operation_model.service_model.endpoint_prefix
                 service_id = self._operation_model.service_model.service_id
                 event = 'after-call.%s.%s' % (service_id.hyphenize(),
                                               self._operation_model.name)