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Diffstat (limited to 'synapse/rest/client/v2_alpha/account_validity.py')
-rw-r--r--synapse/rest/client/v2_alpha/account_validity.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/rest/client/v2_alpha/account_validity.py b/synapse/rest/client/v2_alpha/account_validity.py
index 8091b78285..98f7c60016 100644
--- a/synapse/rest/client/v2_alpha/account_validity.py
+++ b/synapse/rest/client/v2_alpha/account_validity.py
@@ -15,6 +15,8 @@
 
 import logging
 
+from six import ensure_binary
+
 from twisted.internet import defer
 
 from synapse.api.errors import AuthError, SynapseError
@@ -63,7 +65,7 @@ class AccountValidityRenewServlet(RestServlet):
         request.setResponseCode(status_code)
         request.setHeader(b"Content-Type", b"text/html; charset=utf-8")
         request.setHeader(b"Content-Length", b"%d" % (len(response),))
-        request.write(response.encode("utf8"))
+        request.write(ensure_binary(response))
         finish_request(request)
         defer.returnValue(None)