diff --git a/services/searchDataproviders.service.ts b/services/searchDataproviders.service.ts
index a9aaae20..8a732074 100644
--- a/services/searchDataproviders.service.ts
+++ b/services/searchDataproviders.service.ts
@@ -428,7 +428,7 @@ export class SearchDataprovidersService {
         return this.numOfDataproviders(url, properties);
     }
 
-    numOfSearchDataproviders(params: string, properties:EnvProperties, refineQuery:string):any {
+    numOfSearchDataproviders(params: string, properties:EnvProperties, refineQuery:string=null):any {
         let url: string = properties.searchAPIURLLAst+"datasources/count?format=json";
         if(params != "") {
           url += "&q=" + StringUtils.URIEncode(params);