diff --git a/includes/activity/class-activity.php b/includes/activity/class-activity.php
index 96ee095..68caa34 100644
--- a/includes/activity/class-activity.php
+++ b/includes/activity/class-activity.php
@@ -196,7 +196,7 @@ class Activity extends Base_Object {
 	public function set_object( $object ) {
 		// convert array to object
 		if ( is_array( $object ) ) {
-			$object = Base_Object::init_from_array( $object );
+			$object = self::init_from_array( $object );
 		}
 
 		// set object