diff --git a/admin/class-h5p-content-query.php b/admin/class-h5p-content-query.php
index a973f22..9757213 100644
--- a/admin/class-h5p-content-query.php
+++ b/admin/class-h5p-content-query.php
@@ -326,6 +326,7 @@ protected function append_user_data( $results ) {
      */
     $wp_users = get_users(
       array(
+        'blog_id' => null,
         'include' => array_unique( $user_ids ),
         'fields' => array('ID'),
       )
diff --git a/admin/class-h5p-plugin-admin.php b/admin/class-h5p-plugin-admin.php
index c96e6ac..bd7f474 100644
--- a/admin/class-h5p-plugin-admin.php
+++ b/admin/class-h5p-plugin-admin.php
@@ -973,6 +973,7 @@ protected function append_user_name( $results ) {
      */
     $wp_users = get_users(
       array(
+        'blog_id' => null,
         'include' => array_unique( $user_ids ),
         'fields' => array('ID'),
       )