diff --git a/wp-admin/user-edit.php b/wp-admin/user-edit.php
index 5ad99ed96..3503ae3ce 100644
--- a/wp-admin/user-edit.php
+++ b/wp-admin/user-edit.php
@@ -98,6 +98,8 @@ if ( !$user_id ) {
 	} else {
 		wp_die(__('Invalid user ID.'));
 	}
+} elseif ( !get_userdata($user_id) ) {
+	wp_die( __('Invalid user ID.') );
 }
 
 /**