diff --git a/QueryGenerator.php b/QueryGenerator.php
index 38811fc..5db33a7 100644
--- a/QueryGenerator.php
+++ b/QueryGenerator.php
@@ -256,7 +256,10 @@ public function __construct(
     * Append the given clause components and parameters to their existing
     * counterparts for the specified clause.
     *
+    * @param 'select'|'SELECT'|'insert'|'replace'|'update'|'delete'|'from'|'join'|'set'|'columns'|'values'|'where'|'group'|'having'|'order'|'limit'|'offset'|'duplicate'|'modify' $method
+    *
     * @psalm-seal-methods
+    * @seal-methods
     */
    public function __call(string $method, array $args) {
       $method = strtolower($method);