diff --git a/JavaScriptCore/VM/CodeBlock.cpp b/JavaScriptCore/VM/CodeBlock.cpp
index eaf94e2..dc17fc1 100644
--- a/JavaScriptCore/VM/CodeBlock.cpp
+++ b/JavaScriptCore/VM/CodeBlock.cpp
@@ -348,18 +348,23 @@
 {
     int location = it - begin;
     switch (exec->machine()->getOpcodeID(it->u.opcode)) {
-        case op_init: {
-            printf("[%4d] init\n", location);
+        case op_enter: {
+            printf("[%4d] enter\n", location);
             break;
         }
-        case op_init_activation: {
-            printf("[%4d] init_activation\n", location);
+        case op_enter_with_activation: {
+            printf("[%4d] enter_with_activation\n", location);
             break;
         }
         case op_init_arguments: {
             printf("[%4d] init_arguments\n", location);
             break;
         }
+        case op_convert_this: {
+            int r0 = (++it)->u.operand;
+            printf("[%4d] convert_this %s\n", location, registerName(r0).c_str());
+            break;
+        }
         case op_unexpected_load: {
             int r0 = (++it)->u.operand;
             int k0 = (++it)->u.operand;