diff --git a/cachecontrol/caches/redis_cache.py b/cachecontrol/caches/redis_cache.py
index a5a15aa8..bc3d1df7 100644
--- a/cachecontrol/caches/redis_cache.py
+++ b/cachecontrol/caches/redis_cache.py
@@ -27,7 +27,7 @@ def set(self, key, value, expires=None):
             self.conn.set(key, value)
         else:
             expires = expires - datetime.utcnow()
-            self.conn.setex(key, total_seconds(expires), value)
+            self.conn.setex(name=key, time=total_seconds(expires), value=value)
 
     def delete(self, key):
         self.conn.delete(key)