diff --git a/src/containers/SearchPage/SearchPage.helpers.js b/src/containers/SearchPage/SearchPage.helpers.js
index 0be2ba0d..6a8a102c 100644
--- a/src/containers/SearchPage/SearchPage.helpers.js
+++ b/src/containers/SearchPage/SearchPage.helpers.js
@@ -13,11 +13,12 @@ import routeConfiguration from '../../routeConfiguration';
  * @param {Object} paramValue Search parameter value
  * @param {Object} filters Filters configuration
  */
-export const validURLParamForExtendedData = (paramName, paramValue, filters) => {
+export const validURLParamForExtendedData = (paramName, paramValueRaw, filters) => {
   const filtersArray = Object.values(filters);
   // resolve configuration for this filter
   const filterConfig = filtersArray.find(f => f.paramName === paramName);
 
+  const paramValue = paramValueRaw.toString();
   const valueArray = paramValue ? paramValue.split(',') : [];
 
   if (filterConfig && valueArray.length > 0) {