diff --git a/src/obj.h b/src/obj.h
index f3c0f9f2..e8c2d7fe 100644
--- a/src/obj.h
+++ b/src/obj.h
@@ -174,4 +174,7 @@ T& py_cast(VM* vm, const PyVar& var) { UNREACHABLE(); }
 template<typename T>
 T& _py_cast(VM* vm, const PyVar& var) { UNREACHABLE(); }
 
+#define VAR(x) py_var(vm, x)
+
+
 }   // namespace pkpy
\ No newline at end of file
diff --git a/src/vm.h b/src/vm.h
index 7f43c4f5..3d8bfc9f 100644
--- a/src/vm.h
+++ b/src/vm.h
@@ -34,6 +34,7 @@ public:
 };
 
 class VM {
+    VM* vm;     // self reference for simplify code
 public:
     std::stack< std::unique_ptr<Frame> > callstack;
     PyVar _py_op_call;
@@ -57,6 +58,7 @@ public:
     int recursionlimit = 1000;
 
     VM(bool use_stdio){
+        this->vm = this;
         this->use_stdio = use_stdio;
         if(use_stdio){
             this->_stdout = &std::cout;