diff --git a/functionMap.php b/functionMap.php
index 8e85725..8fd0de8 100644
--- a/functionMap.php
+++ b/functionMap.php
@@ -219,4 +219,5 @@
     'wp_nonce_url' => [null, 'action' => '-1|string'],
     'wp_nonce_field' => [null, 'action' => '-1|string'],
     'did_action' => ['int<0, max>'],
+    'get_current_blog_id' => ['int<0, max>'],
 ];
diff --git a/wordpress-stubs.php b/wordpress-stubs.php
index 361bbbf..fa6b600 100644
--- a/wordpress-stubs.php
+++ b/wordpress-stubs.php
@@ -121165,6 +121165,7 @@ function absint($maybeint)
      * @global int $blog_id
      *
      * @return int Site ID.
+     * @phpstan-return int<0, max>
      */
     function get_current_blog_id()
     {