diff --git a/plugins/views_data_export_plugin_style_export.inc b/plugins/views_data_export_plugin_style_export.inc
index 3e6227b..8782f4c 100644
--- a/plugins/views_data_export_plugin_style_export.inc
+++ b/plugins/views_data_export_plugin_style_export.inc
@@ -343,10 +343,14 @@ class views_data_export_plugin_style_export extends views_plugin_style {
           $identifier = $handler->options['expose']['identifier'];
           $option = $view->exposed_input[$identifier];
           // The option may be a string or an array, depending on whether the
-          // widget is a text box/area or a select box.
-          if (is_array($option)) {
-            $option = implode('--', $option);
+          // widget is a text box/area or a select box. Use recursion since it's
+          // possible $option is a multi-dimensional array.
+          $iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($option));
+          $values = array();
+          foreach ($iterator as $value) {
+            $values[] = $value;
           }
+          $option = implode('--', $values);
           $exposed[] = check_plain($identifier) . '_' . check_plain($option);
         }
       }