diff --git a/lib/ldclient-rb/impl/integrations/redis_impl.rb b/lib/ldclient-rb/impl/integrations/redis_impl.rb
index 876f4240..8f6ebb10 100644
--- a/lib/ldclient-rb/impl/integrations/redis_impl.rb
+++ b/lib/ldclient-rb/impl/integrations/redis_impl.rb
@@ -115,7 +115,7 @@ def upsert_internal(kind, new_item)
           end
 
           def initialized_internal?
-            with_connection { |redis| redis.exists(inited_key) }
+            with_connection { |redis| redis.exists?(inited_key) }
           end
 
           def stop