diff -r ee595aae8353 -r b9bf26ea0118 vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java
--- a/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Tue Feb 05 19:14:39 2013 +0100
+++ b/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Thu Feb 07 17:41:41 2013 +0100
@@ -598,7 +598,7 @@
                     emit(out, "@1 = @1.xor64(@2);", smapper.getL(1), smapper.popL());
                     break;
                 case opc_ineg:
-                    emit(out, "@1 = -@1;", smapper.getI(0));
+                    emit(out, "@1 = @1.neg32();", smapper.getI(0));
                     break;
                 case opc_lneg:
                     emit(out, "@1 = @1.neg64();", smapper.getL(0));