diff --git a/wellcoordination/benchmark/rubis.hpp b/wellcoordination/benchmark/rubis.hpp
index e27dd6a..4a7b1ef 100644
--- a/wellcoordination/benchmark/rubis.hpp
+++ b/wellcoordination/benchmark/rubis.hpp
@@ -37,7 +37,7 @@ class Rubis : public ReplicatedObject
       QUERY = 6
     };
     std::atomic<int> auction [200][4]={{0}}; //auctionid-quantity-user propsed max value-max value -valid auction
-    bool registeredusers [200]={false};
+    std::atomic<bool> registeredusers [200]={false};
     int userscounter=0;
     //std::set<std::string> movies;
     //std::set<std::string> customers;