diff --git a/ext/v8/v8_exception.cpp b/ext/v8/v8_exception.cpp
index 2f46981..77242f8 100644
--- a/ext/v8/v8_exception.cpp
+++ b/ext/v8/v8_exception.cpp
@@ -106,13 +106,13 @@ void rr_init_v8_exception() {
   rr_define_singleton_method(ExceptionClass, "SyntaxError", SyntaxError, 1);
   rr_define_singleton_method(ExceptionClass, "Error", Error, 1);
 
-  StackTraceClass = rr_define_class("StackTrace");
+  StackTraceClass = rr_define_class("StackTrace", rr_v8_handle_class());
   rr_define_singleton_method(StackTraceClass, "CurrentStackTrace", Trace::CurrentStackTrace, 1);
   rr_define_method(StackTraceClass, "GetFrame", Trace::GetFrame, 1);
   rr_define_method(StackTraceClass, "GetFrameCount", Trace::GetFrameCount, 0);
   rr_define_method(StackTraceClass, "AsArray", Trace::AsArray, 0);
 
-  StackFrameClass = rr_define_class("StackFrame");
+  StackFrameClass = rr_define_class("StackFrame", rr_v8_handle_class());
   rr_define_method(StackFrameClass, "GetLineNumber", Frame::GetLineNumber, 0);
   rr_define_method(StackFrameClass, "GetColumn", Frame::GetColumn, 0);
   rr_define_method(StackFrameClass, "GetScriptName", Frame::GetScriptName, 0);
diff --git a/ext/v8/v8_message.cpp b/ext/v8/v8_message.cpp
index b33bf9e..fb82d1b 100644
--- a/ext/v8/v8_message.cpp
+++ b/ext/v8/v8_message.cpp
@@ -49,7 +49,7 @@ namespace {
 }
 
 void rr_init_message() {
-  MessageClass = rr_define_class("Message");
+  MessageClass = rr_define_class("Message", rr_v8_handle_class());
   rr_define_method(MessageClass, "Get", Get, 0);
   rr_define_method(MessageClass, "GetSourceLine", GetSourceLine, 0);
   rr_define_method(MessageClass, "GetScriptResourceName", GetScriptResourceName, 0);
diff --git a/ext/v8/v8_script.cpp b/ext/v8/v8_script.cpp
index caf0fce..3ae2efa 100644
--- a/ext/v8/v8_script.cpp
+++ b/ext/v8/v8_script.cpp
@@ -29,7 +29,7 @@ namespace {
 }
 
 void rr_init_script() {
-  VALUE ScriptClass = rr_define_class("Script");
+  VALUE ScriptClass = rr_define_class("Script", rr_v8_handle_class());
   rr_define_singleton_method(ScriptClass, "New", New, 2);
   rr_define_singleton_method(ScriptClass, "Compile", Compile, 2);
   rr_define_method(ScriptClass, "Run", Run, 0);
diff --git a/ext/v8/v8_template.cpp b/ext/v8/v8_template.cpp
index b7f706a..d97ba29 100644
--- a/ext/v8/v8_template.cpp
+++ b/ext/v8/v8_template.cpp
@@ -311,7 +311,7 @@ namespace {
 }
 
 void rr_init_template() {
-  VALUE Template = rr_define_class("Template");
+  VALUE Template = rr_define_class("Template", rr_v8_handle_class());
   rr_define_method(Template, "Set", Set, 2);
 
   ObjectTemplateClass = rr_define_class("ObjectTemplate", Template);
diff --git a/ext/v8/v8_value.cpp b/ext/v8/v8_value.cpp
index 9efe79e..8957fe2 100644
--- a/ext/v8/v8_value.cpp
+++ b/ext/v8/v8_value.cpp
@@ -135,7 +135,7 @@ VALUE rr_v8_value_empty() {
 }
 
 void rr_init_value() {
-  ValueClass = rr_define_class("Value");
+  ValueClass = rr_define_class("Value", rr_v8_handle_class());
   rr_define_const("Empty", rr_v8_handle_new(ValueClass, Handle<Value>()));
 
   rr_define_method(ValueClass, "IsEmpty", IsEmpty, 0);