diff --git a/modules/crm_core_activity/includes/CRMFeedsActivityProcessor.inc b/modules/crm_core_activity/includes/CRMFeedsActivityProcessor.inc
index 15627cf..c589840 100644
--- a/modules/crm_core_activity/includes/CRMFeedsActivityProcessor.inc
+++ b/modules/crm_core_activity/includes/CRMFeedsActivityProcessor.inc
@@ -83,7 +83,7 @@ class CRMFeedsActivityProcessor extends FeedsProcessor {
    *
    * @todo: move to processor stage?
    */
-  public function expire($time = NULL) {
+  public function expire(FeedsSource $source, $time = NULL) {
     if ($time === NULL) {
       $time = $this->expiryTime();
     }