diff --git a/core/classes/MantisFilter.class.php b/core/classes/MantisFilter.class.php
index 749f33318b..5d089a0282 100644
--- a/core/classes/MantisFilter.class.php
+++ b/core/classes/MantisFilter.class.php
@@ -70,6 +70,6 @@ abstract function display( $p_filter_value );
 	 * filter options, not including an 'any' value.
 	 * @return array Filter options keyed by value=>display
 	 */
-	function options() {}
+	public function options() {}
 }