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-rw-r--r--mediagoblin/meddleware/csrf.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/mediagoblin/meddleware/csrf.py b/mediagoblin/meddleware/csrf.py
index 661f0ba2..44d42d75 100644
--- a/mediagoblin/meddleware/csrf.py
+++ b/mediagoblin/meddleware/csrf.py
@@ -111,7 +111,7 @@ class CsrfMeddleware(BaseMeddleware):
httponly=True)
# update the Vary header
- response.vary = (getattr(response, 'vary', None) or []) + ['Cookie']
+ response.vary = list(getattr(response, 'vary', None) or []) + ['Cookie']
def _make_token(self, request):
"""Generate a new token to use for CSRF protection."""