diff --git a/scripts/fixup_inboxes.php b/scripts/fixup_inboxes.php
index 79cca5c7cd..7bee347a47 100755
--- a/scripts/fixup_inboxes.php
+++ b/scripts/fixup_inboxes.php
@@ -50,18 +50,15 @@ $cache = common_memcache();
 while ($user->fetch()) {
     common_log(LOG_INFO, 'Updating inbox for user ' . $user->id);
 	$user->query('BEGIN');
-	$inbox = new Notice_inbox();
-	$inbox->user_id = $user->id;
-	$result = $inbox->delete();
-	if (is_null($result) || $result === false) {
-		common_log_db_error($inbox, 'DELETE', __FILE__);
-		continue;
-	}
 	$result = $inbox->query('INSERT LOW_PRIORITY INTO notice_inbox (user_id, notice_id, created) ' .
 							'SELECT ' . $user->id . ', notice.id, notice.created ' .
 							'FROM subscription JOIN notice ON subscription.subscribed = notice.profile_id ' .
 							'WHERE subscription.subscriber = ' . $user->id . ' ' .
-							'AND notice.created >= subscription.created');
+							'AND notice.created >= subscription.created ' . 
+							'AND NOT EXISTS (SELECT user_id, notice_id ' .
+							'FROM notice_inbox ' .
+							'WHERE user_id = ' . $user->id . ' ' . 
+							'AND notice_id = notice.id)');
 	if (is_null($result) || $result === false) {
 		common_log_db_error($inbox, 'INSERT', __FILE__);
 		continue;