diff -r 65cab8539582 -r 71e5cd5b29bc rt/emul/mini/src/main/resources/org/apidesign/vm4brwsr/emul/lang/java_lang_Number.js
--- a/rt/emul/mini/src/main/resources/org/apidesign/vm4brwsr/emul/lang/java_lang_Number.js	Fri Feb 27 19:28:07 2015 +0100
+++ b/rt/emul/mini/src/main/resources/org/apidesign/vm4brwsr/emul/lang/java_lang_Number.js	Sun Jan 24 14:31:36 2016 +0100
@@ -1,5 +1,4 @@
 // empty line needed here
-
 (function(numberPrototype) {
     numberPrototype.add32 = function(x) {
         return (this + x) | 0;
@@ -498,12 +497,11 @@
         return (this / x) | 0;
     }
 
-    numberPrototype.mod32 = function(x) {
+    myNum.mod32 = function(a, x) {
         if (x === 0) {
             __handleDivByZero();
         }
-
-        return (this % x);
+        return a % x;
     }
 
     numberPrototype.div64 = function(x) {