diff --git a/valuescript_vm/src/builtins/error_builtin.rs b/valuescript_vm/src/builtins/error_builtin.rs
index c174978..69c3b55 100644
--- a/valuescript_vm/src/builtins/error_builtin.rs
+++ b/valuescript_vm/src/builtins/error_builtin.rs
@@ -42,6 +42,7 @@ impl BuiltinObject for ErrorBuiltin {
     Some(Rc::new(VsClass {
       constructor: SET_MESSAGE.to_val(),
       prototype: make_error_prototype(),
+      static_: VsObject::default().to_val(),
     }))
   }
 }
diff --git a/valuescript_vm/src/builtins/range_error_builtin.rs b/valuescript_vm/src/builtins/range_error_builtin.rs
index e3b3115..470e4a7 100644
--- a/valuescript_vm/src/builtins/range_error_builtin.rs
+++ b/valuescript_vm/src/builtins/range_error_builtin.rs
@@ -33,6 +33,7 @@ impl BuiltinObject for RangeErrorBuiltin {
     Some(Rc::new(VsClass {
       constructor: Val::Static(&SET_MESSAGE),
       prototype: make_range_error_prototype(),
+      static_: VsObject::default().to_val(),
     }))
   }
 }
diff --git a/valuescript_vm/src/builtins/type_error_builtin.rs b/valuescript_vm/src/builtins/type_error_builtin.rs
index 7fcbf50..634946b 100644
--- a/valuescript_vm/src/builtins/type_error_builtin.rs
+++ b/valuescript_vm/src/builtins/type_error_builtin.rs
@@ -41,6 +41,7 @@ impl BuiltinObject for TypeErrorBuiltin {
     Some(Rc::new(VsClass {
       constructor: Val::Static(&SET_MESSAGE),
       prototype: make_type_error_prototype(),
+      static_: VsObject::default().to_val(),
     }))
   }
 }
diff --git a/valuescript_vm/src/bytecode_decoder.rs b/valuescript_vm/src/bytecode_decoder.rs
index 4c3a70a..f22cbdd 100644
--- a/valuescript_vm/src/bytecode_decoder.rs
+++ b/valuescript_vm/src/bytecode_decoder.rs
@@ -147,6 +147,7 @@ impl BytecodeDecoder {
       BytecodeType::Class => VsClass {
         constructor: self.decode_val(registers),
         prototype: self.decode_val(registers),
+        static_: VsObject::default().to_val(),
       }
       .to_val(),
       BytecodeType::BigInt => self.decode_bigint().to_val(),
diff --git a/valuescript_vm/src/vs_class.rs b/valuescript_vm/src/vs_class.rs
index 75fb8d9..d26dd9c 100644
--- a/valuescript_vm/src/vs_class.rs
+++ b/valuescript_vm/src/vs_class.rs
@@ -8,6 +8,7 @@ use super::vs_value::Val;
 pub struct VsClass {
   pub constructor: Val,
   pub prototype: Val,
+  pub static_: Val,
 }
 
 impl VsClass {}