diff --git a/src/as/com/threerings/util/Util.as b/src/as/com/threerings/util/Util.as
index d449ba1ac..246544ec1 100644
--- a/src/as/com/threerings/util/Util.as
+++ b/src/as/com/threerings/util/Util.as
@@ -59,6 +59,19 @@ public class Util
         }
     }
 
+    /**
+     * Return a var-args function that will attempt to pass only the arguments accepted by the
+     * passed-in function. Does not work if the passed-in function is varargs, and anyway
+     * then you don't need adapting, do you?
+     */
+    public static function adapt (fn :Function) :Function
+    {
+        return function (... args) :* {
+            args.length = fn.length; // fit the args to the fn, filling in 'undefined' if growing
+            return fn.apply(null, args);
+        }
+    }
+
     /**
      * Returns true if the specified object is just a regular old associative hash.
      */