diff --git a/webapp/src/main/webapp/themes/iph/templates/queryBuilder.ftl b/webapp/src/main/webapp/themes/iph/templates/queryBuilder.ftl
index 61cbd800..38862004 100644
--- a/webapp/src/main/webapp/themes/iph/templates/queryBuilder.ftl
+++ b/webapp/src/main/webapp/themes/iph/templates/queryBuilder.ftl
@@ -85,7 +85,7 @@
         if ('operator' in json_query && json_query.operator.startsWith("not_")){
           string_query +=  "NOT ";
         }
-        string_query += json_query.field + ":\"" + json_query.value.toString().replace(/['"]+/g, '') + "\"";
+        string_query += json_query.field + ":\'" + json_query.value.toString().replace(/['"]+/g, '') + "\'";
       }
 	  return string_query;
 	}