diff --git a/global_filter.module b/global_filter.module
index d78bd69..2578544 100755
--- a/global_filter.module
+++ b/global_filter.module
@@ -63,9 +63,15 @@ function global_filter_init() {
         // Example: http://mysite.com?field_country=23,7,12
         global_filter_set_on_session($name, explode(',', $_REQUEST[$name]));
       }
-      elseif (isset($_POST[$name]) && is_array($_POST[$name])) {
-        // Set value through post of a multi-valued widget.
-        global_filter_set_on_session($name, array_map('check_plain', $_POST[$name]));
+      elseif (isset($_POST[$name])) {
+        if (is_array($_POST[$name])) {
+          // Set value through post of a multi-valued widget.
+          global_filter_set_on_session($name, array_map('check_plain', $_POST[$name]));
+        }
+        else {
+          // Set value through post of a single-valued widget.
+          global_filter_set_on_session($name, check_plain($_POST[$name]));
+        }
       }
       else {
         $value = global_filter_get_session_value($name);