diff --git a/lib/sidekiq.rb b/lib/sidekiq.rb
index 0411dbe2..771be8f0 100644
--- a/lib/sidekiq.rb
+++ b/lib/sidekiq.rb
@@ -69,7 +69,7 @@ module Sidekiq
   def self.redis=(hash)
     if hash.is_a?(Hash)
       @redis = RedisConnection.create(hash)
-      options[:namespace] = hash[:namespace]
+      options[:namespace] ||= hash[:namespace]
     elsif hash.is_a?(ConnectionPool)
       @redis = hash
     else