diff --git a/lib/groupnoticestream.php b/lib/groupnoticestream.php
index c75d621419..65db308df5 100644
--- a/lib/groupnoticestream.php
+++ b/lib/groupnoticestream.php
@@ -74,7 +74,7 @@ class GroupNoticeStream extends ScopingNoticeStream
     function getNotices($offset, $limit, $sinceId = null, $maxId = null)
     {
         if ($this->impossibleStream()) {
-            return array();
+            return new ArrayWrapper(array());
         } else {
             return parent::getNotices($offset, $limit, $sinceId, $maxId);
         }
diff --git a/lib/profilenoticestream.php b/lib/profilenoticestream.php
index cd89769ec2..1fde1c6025 100644
--- a/lib/profilenoticestream.php
+++ b/lib/profilenoticestream.php
@@ -74,7 +74,7 @@ class ProfileNoticeStream extends ScopingNoticeStream
     function getNotices($offset, $limit, $sinceId = null, $maxId = null)
     {
         if ($this->impossibleStream()) {
-            return array();
+            return new ArrayWrapper(array());
         } else {
             return parent::getNotices($offset, $limit, $sinceId, $maxId);
         }