--- module.inc?rev=1.65	2005-02-22 22:25:50.000000000 +0100
+++ module.inc	2005-02-22 23:45:28.000000000 +0100
@@ -172,10 +172,13 @@ function module_implements($hook) {
  * @return
  *   The return value of the hook implementation.
  */
-function module_invoke($module, $hook, $a1 = NULL, $a2 = NULL, $a3 = NULL, $a4 = NULL) {
+function module_invoke() {
+  $args = func_get_args();
+  $module = array_shift($args);
+  $hook = array_shift($args);
   $function = $module .'_'. $hook;
   if (function_exists($function)) {
-    return $function($a1, $a2, $a3, $a4);
+    return call_user_func_array($function, $args);
   }
 }