diff --git a/plugins/auto_assign_labels/init.php b/plugins/auto_assign_labels/init.php
index 911adb6b8..cc70e2dff 100644
--- a/plugins/auto_assign_labels/init.php
+++ b/plugins/auto_assign_labels/init.php
@@ -1,6 +1,7 @@
 <?php
 class Auto_Assign_Labels extends Plugin {
 
+	/* @var PluginHost $host */
 	private $host;
 
 	function about() {
@@ -18,9 +19,10 @@ class Auto_Assign_Labels extends Plugin {
 	function get_all_labels_filter_format($owner_uid) {
 		$rv = array();
 
-		$result = db_query("SELECT id, fg_color, bg_color, caption FROM ttrss_labels2 WHERE owner_uid = " . $owner_uid);
+		$sth = $this->pdo->prepare("SELECT id, fg_color, bg_color, caption FROM ttrss_labels2 WHERE owner_uid = ?");
+		$sth->execute([$owner_uid]);
 
-		while ($line = db_fetch_assoc($result)) {
+		while ($line = $sth->fetch()) {
 			array_push($rv, array(Labels::label_to_feed_id($line["id"]),
 				$line["caption"], $line["fg_color"], $line["bg_color"]));
 		}