diff -r ff57af563cb8 -r b9bf26ea0118 emul/mini/src/main/resources/org/apidesign/vm4brwsr/emul/lang/java_lang_Number.js
--- a/emul/mini/src/main/resources/org/apidesign/vm4brwsr/emul/lang/java_lang_Number.js	Thu Feb 07 16:11:53 2013 +0100
+++ b/emul/mini/src/main/resources/org/apidesign/vm4brwsr/emul/lang/java_lang_Number.js	Thu Feb 07 17:41:41 2013 +0100
@@ -4,6 +4,7 @@
 Number.prototype.mul32 = function(x) { 
     return (((this * (x >> 16)) << 16) + this * (x & 0xFFFF)) | 0;
 };
+Number.prototype.neg32 = function() { return (-this) | 0; };
 
 Number.prototype.toInt8 = function()  { return (this << 24) >> 24; };
 Number.prototype.toInt16 = function() { return (this << 16) >> 16; };