diff --git a/ext/autocomplete/main.php b/ext/autocomplete/main.php
index 2fce4876..0c7b7368 100644
--- a/ext/autocomplete/main.php
+++ b/ext/autocomplete/main.php
@@ -15,7 +15,7 @@ class AutoComplete extends Extension
         global $page;
 
         if ($event->page_matches("api/internal/autocomplete")) {
-            $limit = $_GET["limit"] ?? 0;
+            $limit = (int)($_GET["limit"] ?? 0);
             $s = $_GET["s"] ?? null;
 
             $res = $this->complete($s, $limit);