diff --git a/requests/sessions.py b/requests/sessions.py
index 8d754274..de0d9d67 100644
--- a/requests/sessions.py
+++ b/requests/sessions.py
@@ -434,7 +434,7 @@ class Session(SessionRedirectMixin):
         kwargs.setdefault('stream', self.stream)
         kwargs.setdefault('verify', self.verify)
         kwargs.setdefault('cert', self.cert)
-        kwargs.setdefault('proxies', self.proxies
+        kwargs.setdefault('proxies', self.proxies)
 
         # It's possible that users might accidentally send a Request object.
         # Guard against that specific failure case.