diff --git a/lib/filteringnoticestream.php b/lib/filteringnoticestream.php
index 9f3b8ac858..119f71e404 100644
--- a/lib/filteringnoticestream.php
+++ b/lib/filteringnoticestream.php
@@ -82,14 +82,11 @@ abstract class FilteringNoticeStream extends NoticeStream
                 break;
             }
 
-			$notices = $raw->fetchAll();
-			
-			// XXX: this should probably only be in the scoping one.
-			
-			Notice::fillGroups($notices);
-			Notice::fillReplies($notices);
-			
-			foreach ($notices as $notice) {
+            $notices = $raw->fetchAll();
+            
+            $this->prefill($notices);
+
+            foreach ($notices as $notice) {
                 if ($this->filter($notice)) {
                     $filtered[] = $notice;
                     if (count($filtered) >= $total) {
@@ -127,4 +124,9 @@ abstract class FilteringNoticeStream extends NoticeStream
 
         return $ids;
     }
+
+    function prefill($notices)
+    {
+        return;
+    }
 }
diff --git a/lib/scopingnoticestream.php b/lib/scopingnoticestream.php
index 30b80f10e5..30a7b708d2 100644
--- a/lib/scopingnoticestream.php
+++ b/lib/scopingnoticestream.php
@@ -73,4 +73,12 @@ class ScopingNoticeStream extends FilteringNoticeStream
     {
         return $notice->inScope($this->profile);
     }
+
+    function prefill($notices)
+    {
+        // XXX: this should probably only be in the scoping one.
+            
+        Notice::fillGroups($notices);
+        Notice::fillReplies($notices);
+    }
 }