diff --git a/client/javascript/app/script_client.js b/client/javascript/app/script_client.js
index b5ad585527d415f49dae47ec580f51cb5b57cd2b..d139ae71708f5b9e32a78dd8688c4a03a8a1c8f4 100644
--- a/client/javascript/app/script_client.js
+++ b/client/javascript/app/script_client.js
@@ -920,7 +920,7 @@ vitisApp.on('appInitCtrlLoaded', function () {
                             "operators": aOperators
                         });
                     }else{
-                        oFilter["operators"].concat(aOperators);
+                        oFilter["operators"] = oFilter["operators"].concat(aOperators);
                     }
                 } else {
                     if (oFormElement["type"] == "text") {