diff --git a/core/src/avm2/globals/flash/display/movieclip.rs b/core/src/avm2/globals/flash/display/movieclip.rs
index 27c08477c..9f797c350 100644
--- a/core/src/avm2/globals/flash/display/movieclip.rs
+++ b/core/src/avm2/globals/flash/display/movieclip.rs
@@ -6,7 +6,7 @@ use crate::avm2::class::Class;
 use crate::avm2::globals::flash::display::{framelabel, scene};
 use crate::avm2::method::Method;
 use crate::avm2::names::{Namespace, QName};
-use crate::avm2::object::{ArrayObject, Object, StageObject, TObject};
+use crate::avm2::object::{ArrayObject, Object, TObject};
 use crate::avm2::string::AvmString;
 use crate::avm2::traits::Trait;
 use crate::avm2::value::Value;
@@ -535,26 +535,6 @@ pub fn next_scene<'gc>(
     Ok(Value::Undefined)
 }
 
-/// Implements `graphics`.
-pub fn graphics<'gc>(
-    activation: &mut Activation<'_, 'gc, '_>,
-    this: Option<Object<'gc>>,
-    _args: &[Value<'gc>],
-) -> Result<Value<'gc>, Error> {
-    if let Some(dobj) = this.and_then(|o| o.as_display_object()) {
-        let graphics_proto = activation.context.avm2.prototypes().graphics;
-
-        return Ok(StageObject::for_display_object(
-            activation.context.gc_context,
-            dobj,
-            graphics_proto,
-        )
-        .into());
-    }
-
-    Ok(Value::Undefined)
-}
-
 /// Construct `MovieClip`'s class.
 pub fn create_class<'gc>(mc: MutationContext<'gc, '_>) -> GcCell<'gc, Class<'gc>> {
     let class = Class::new(
@@ -657,10 +637,5 @@ pub fn create_class<'gc>(mc: MutationContext<'gc, '_>) -> GcCell<'gc, Class<'gc>
         Method::from_builtin(next_scene),
     ));
 
-    write.define_instance_trait(Trait::from_getter(
-        QName::new(Namespace::public(), "graphics"),
-        Method::from_builtin(graphics),
-    ));
-
     class
 }
diff --git a/core/src/avm2/globals/flash/display/sprite.rs b/core/src/avm2/globals/flash/display/sprite.rs
index e9c930515..b63ea8886 100644
--- a/core/src/avm2/globals/flash/display/sprite.rs
+++ b/core/src/avm2/globals/flash/display/sprite.rs
@@ -1,10 +1,11 @@
 //! `flash.display.Sprite` builtin/prototype
 
 use crate::avm2::activation::Activation;
-use crate::avm2::class::Class;
+use crate::avm2::class::{Class, ClassAttributes};
 use crate::avm2::method::Method;
 use crate::avm2::names::{Namespace, QName};
-use crate::avm2::object::Object;
+use crate::avm2::object::{Object, StageObject, TObject};
+use crate::avm2::traits::Trait;
 use crate::avm2::value::Value;
 use crate::avm2::Error;
 use gc_arena::{GcCell, MutationContext};
@@ -31,9 +32,29 @@ pub fn class_init<'gc>(
     Ok(Value::Undefined)
 }
 
+/// Implements `graphics`.
+pub fn graphics<'gc>(
+    activation: &mut Activation<'_, 'gc, '_>,
+    this: Option<Object<'gc>>,
+    _args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error> {
+    if let Some(dobj) = this.and_then(|o| o.as_display_object()) {
+        let graphics_proto = activation.context.avm2.prototypes().graphics;
+
+        return Ok(StageObject::for_display_object(
+            activation.context.gc_context,
+            dobj,
+            graphics_proto,
+        )
+        .into());
+    }
+
+    Ok(Value::Undefined)
+}
+
 /// Construct `Sprite`'s class.
 pub fn create_class<'gc>(mc: MutationContext<'gc, '_>) -> GcCell<'gc, Class<'gc>> {
-    Class::new(
+    let class = Class::new(
         QName::new(Namespace::package("flash.display"), "Sprite"),
         Some(
             QName::new(
@@ -45,5 +66,16 @@ pub fn create_class<'gc>(mc: MutationContext<'gc, '_>) -> GcCell<'gc, Class<'gc>
         Method::from_builtin(instance_init),
         Method::from_builtin(class_init),
         mc,
-    )
+    );
+
+    let mut write = class.write(mc);
+
+    write.set_attributes(ClassAttributes::SEALED);
+
+    write.define_instance_trait(Trait::from_getter(
+        QName::new(Namespace::public(), "graphics"),
+        Method::from_builtin(graphics),
+    ));
+
+    class
 }