diff --git a/lib/exe/indexer.php b/lib/exe/indexer.php
index 35aa1beef6e1cf484386da662e3d0713a11fb492..82116347324dc556643e159b771b93b08cd15e8c 100644
--- a/lib/exe/indexer.php
+++ b/lib/exe/indexer.php
@@ -364,7 +364,7 @@ function sendDigest() {
         foreach($users as $data) {
             list($user, $style, $lastupdate) = $data;
             $lastupdate = (int) $lastupdate;
-            if ($lastupdate + $conf['subscribe_interval'] > time()) {
+            if ($lastupdate + $conf['subscribe_time'] > time()) {
                 // Less than the configured time period passed since last
                 // update.
                 continue;