diff -r 3a896e9b57e2 -r 04ce04a54936 src/Interpreter.cpp
--- a/src/Interpreter.cpp	Sat Nov 17 20:11:05 2012 -0800
+++ b/src/Interpreter.cpp	Sat Nov 17 20:23:36 2012 -0800
@@ -636,7 +636,7 @@
 
 case OP_USHR:
 {
-    top.sp[-2].i32 = unsigned(top.sp[-2].i32) << unsigned(top.sp[-1].i32);
+    top.sp[-2].i32 = unsigned(top.sp[-2].i32) >> unsigned(top.sp[-1].i32);
     top.sp--;
     break;
 }