diff --git a/core/src/avm2/globals.rs b/core/src/avm2/globals.rs
index e08a6a18e..a087e2144 100644
--- a/core/src/avm2/globals.rs
+++ b/core/src/avm2/globals.rs
@@ -314,7 +314,7 @@ fn function<'gc>(
     let method = Method::from_builtin(nf, name, mc);
     let as3fn = FunctionObject::from_method(activation, method, scope, None, None).into();
     domain.export_definition(qname, script, mc)?;
-    global.install_const_late(mc, None, qname, as3fn);
+    global.install_const_late(mc, qname, as3fn);
 
     Ok(())
 }
@@ -332,7 +332,7 @@ fn dynamic_class<'gc>(
     let class = class_object.inner_class_definition();
     let name = class.read().name();
 
-    global.install_const_late(mc, None, name, class_object.into());
+    global.install_const_late(mc, name, class_object.into());
     domain.export_definition(name, script, mc)
 }
 
@@ -375,7 +375,6 @@ fn class<'gc>(
     let class_object = ClassObject::from_class(activation, class_def, super_class)?;
     global.install_const_late(
         activation.context.gc_context,
-        None,
         class_name,
         class_object.into(),
     );
@@ -395,7 +394,7 @@ fn constant<'gc>(
     let (_, mut global, mut domain) = script.init();
     let name = QName::new(Namespace::package(package), name);
     domain.export_definition(name, script, mc)?;
-    global.install_const_late(mc, None, name, value);
+    global.install_const_late(mc, name, value);
 
     Ok(())
 }
diff --git a/core/src/avm2/globals/vector.rs b/core/src/avm2/globals/vector.rs
index 6dff556e6..4d499bdce 100644
--- a/core/src/avm2/globals/vector.rs
+++ b/core/src/avm2/globals/vector.rs
@@ -73,7 +73,6 @@ pub fn class_init<'gc>(
 
         globals.install_const_late(
             activation.context.gc_context,
-            None,
             int_vector_name,
             int_vector_class.into(),
         );
@@ -89,7 +88,6 @@ pub fn class_init<'gc>(
 
         globals.install_const_late(
             activation.context.gc_context,
-            None,
             uint_vector_name,
             uint_vector_class.into(),
         );
@@ -105,7 +103,6 @@ pub fn class_init<'gc>(
 
         globals.install_const_late(
             activation.context.gc_context,
-            None,
             number_vector_name,
             number_vector_class.into(),
         );
@@ -120,7 +117,6 @@ pub fn class_init<'gc>(
 
         globals.install_const_late(
             activation.context.gc_context,
-            None,
             object_vector_name,
             object_vector_class.into(),
         );
diff --git a/core/src/avm2/object.rs b/core/src/avm2/object.rs
index e193d939e..cec5fe6ea 100644
--- a/core/src/avm2/object.rs
+++ b/core/src/avm2/object.rs
@@ -560,18 +560,15 @@ pub trait TObject<'gc>: 'gc + Collect + Debug + Into<Object<'gc>> + Clone + Copy
     }
 
 
-
-    
     /// Install a const trait on the global object.
     /// This should only ever be called on the `global` object, during initialization.
     fn install_const_late(
         &mut self,
         mc: MutationContext<'gc, '_>,
-        slot_id: Option<u32>,
         name: QName<'gc>,
         value: Value<'gc>,
     ) {
-        let new_slot_id = self.vtable().unwrap().install_const_trait_late(mc, slot_id, name, value.clone());
+        let new_slot_id = self.vtable().unwrap().install_const_trait_late(mc, name, value.clone());
         self.base_mut(mc).install_const_slot_late(new_slot_id, value);
     }
 
diff --git a/core/src/avm2/vtable.rs b/core/src/avm2/vtable.rs
index 66e780c47..140770546 100644
--- a/core/src/avm2/vtable.rs
+++ b/core/src/avm2/vtable.rs
@@ -288,30 +288,13 @@ impl<'gc> VTable<'gc> {
     pub fn install_const_trait_late(
         self,
         mc: MutationContext<'gc, '_>,
-        slot_id: Option<u32>,
         name: QName<'gc>,
         value: Value<'gc>,
     ) -> u32 {
         let mut write = self.0.write(mc);
 
-        let new_slot_id = if let Some(slot_id) = slot_id {
-
-            if slot_id == 0 {
-                write.default_slots.push(Some(value));
-                write.default_slots.len() as u32 - 1
-            } else {
-                // Should be safe from slot conflicts, as `global` has a fresh Object vtable.
-                if slot_id as usize >= write.default_slots.len() {
-                    write.default_slots.resize_with(slot_id as usize + 1, Default::default);
-                }
-                write.default_slots[slot_id as usize] = Some(value);
-                slot_id
-            }
-
-        } else {
-            write.default_slots.push(Some(value));
-            write.default_slots.len() as u32 - 1
-        };
+        write.default_slots.push(Some(value));
+        let new_slot_id = write.default_slots.len() as u32 - 1;
         write.resolved_traits.insert(name, Property::new_slot(new_slot_id));
 
         new_slot_id