diff --git a/search_api_ranges.module b/search_api_ranges.module
index 37e5592..c5599d3 100644
--- a/search_api_ranges.module
+++ b/search_api_ranges.module
@@ -245,7 +245,7 @@ function search_api_ranges_block_view_form($form, &$form_state, $variables) {
  */
 function search_api_ranges_block_view_form_submit($form, &$form_state) {
   $values = $form_state['values'];
-  $range_field = $form_state['input']['range-field'];
+  $range_field = rawurlencode($form_state['input']['range-field']);
 
   // Prepare params and existing filter $pos (if any)
   $params = drupal_get_query_parameters($_GET, array('q', 'page'));