diff --git a/core/src/avm2/globals.rs b/core/src/avm2/globals.rs
index 29d637e2a..3df339bc0 100644
--- a/core/src/avm2/globals.rs
+++ b/core/src/avm2/globals.rs
@@ -643,15 +643,6 @@ pub fn load_player_globals<'gc>(
     );
     class(activation, flash::text::font::create_class(mc), script)?;
 
-    // package `flash.crypto`
-
-    // package `flash.external`
-    class(
-        activation,
-        flash::external::externalinterface::create_class(mc),
-        script,
-    )?;
-
     // Inside this call, the macro `avm2_system_classes_playerglobal`
     // triggers classloading. Therefore, we run `load_playerglobal`
     // relative late, so that it can access classes defined before
diff --git a/core/src/avm2/globals/flash/external.rs b/core/src/avm2/globals/flash/external.rs
index 8bccf102a..67bc46ce7 100644
--- a/core/src/avm2/globals/flash/external.rs
+++ b/core/src/avm2/globals/flash/external.rs
@@ -1,3 +1,3 @@
 //! `flash.external` namespace
 
-pub mod externalinterface;
+pub mod external_interface;
diff --git a/core/src/avm2/globals/flash/external/ExternalInterface.as b/core/src/avm2/globals/flash/external/ExternalInterface.as
new file mode 100644
index 000000000..ffae6a3f5
--- /dev/null
+++ b/core/src/avm2/globals/flash/external/ExternalInterface.as
@@ -0,0 +1,11 @@
+package flash.external
+{
+   public final class ExternalInterface
+   {
+      public static native function get available(): Boolean;
+      
+      public static native function addCallback(functionName: String, closure: Function) : void;
+      
+      public static native function call(functionName: String, ... arguments) : *;
+   }
+}
diff --git a/core/src/avm2/globals/flash/external/external_interface.rs b/core/src/avm2/globals/flash/external/external_interface.rs
new file mode 100644
index 000000000..208895962
--- /dev/null
+++ b/core/src/avm2/globals/flash/external/external_interface.rs
@@ -0,0 +1,58 @@
+use crate::avm2::{Activation, Error, Object, Value};
+use crate::external::{Callback, Value as ExternalValue};
+
+pub fn call<'gc>(
+    activation: &mut Activation<'_, 'gc, '_>,
+    _this: Option<Object<'gc>>,
+    args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error<'gc>> {
+    if args.is_empty() {
+        return Ok(Value::Null);
+    }
+
+    let name = args.get(0).unwrap().coerce_to_string(activation)?;
+    if let Some(method) = activation
+        .context
+        .external_interface
+        .get_method_for(&name.to_utf8_lossy())
+    {
+        let mut external_args = Vec::with_capacity(args.len() - 1);
+        for arg in &args[1..] {
+            external_args.push(ExternalValue::from_avm2(arg.to_owned()));
+        }
+        Ok(method
+            .call(&mut activation.context, &external_args)
+            .into_avm2(activation))
+    } else {
+        Ok(Value::Null)
+    }
+}
+
+pub fn get_available<'gc>(
+    activation: &mut Activation<'_, 'gc, '_>,
+    _this: Option<Object<'gc>>,
+    _args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error<'gc>> {
+    Ok(activation.context.external_interface.available().into())
+}
+
+pub fn add_callback<'gc>(
+    activation: &mut Activation<'_, 'gc, '_>,
+    _this: Option<Object<'gc>>,
+    args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error<'gc>> {
+    if args.len() < 2 {
+        return Ok(Value::Undefined);
+    }
+
+    let name = args.get(0).unwrap().coerce_to_string(activation)?;
+    let method = args.get(1).unwrap();
+
+    if let Value::Object(method) = method {
+        activation
+            .context
+            .external_interface
+            .add_callback(name.to_string(), Callback::Avm2 { method: *method });
+    }
+    Ok(Value::Undefined)
+}
diff --git a/core/src/avm2/globals/flash/external/externalinterface.rs b/core/src/avm2/globals/flash/external/externalinterface.rs
deleted file mode 100644
index a8cca495b..000000000
--- a/core/src/avm2/globals/flash/external/externalinterface.rs
+++ /dev/null
@@ -1,117 +0,0 @@
-//! `flash.external.ExternalInterface` builtin/prototype
-
-use crate::avm2::class::{Class, ClassAttributes};
-use crate::avm2::method::{Method, NativeMethodImpl};
-use crate::avm2::Multiname;
-use crate::avm2::{Activation, Error, Namespace, Object, QName, Value};
-use crate::external::{Callback, Value as ExternalValue};
-use gc_arena::{GcCell, MutationContext};
-
-fn instance_init<'gc>(
-    activation: &mut Activation<'_, 'gc, '_>,
-    this: Option<Object<'gc>>,
-    _args: &[Value<'gc>],
-) -> Result<Value<'gc>, Error<'gc>> {
-    if let Some(this) = this {
-        activation.super_init(this, &[])?;
-    }
-
-    Ok(Value::Undefined)
-}
-
-fn class_init<'gc>(
-    _activation: &mut Activation<'_, 'gc, '_>,
-    _this: Option<Object<'gc>>,
-    _args: &[Value<'gc>],
-) -> Result<Value<'gc>, Error<'gc>> {
-    Ok(Value::Undefined)
-}
-
-pub fn call<'gc>(
-    activation: &mut Activation<'_, 'gc, '_>,
-    _this: Option<Object<'gc>>,
-    args: &[Value<'gc>],
-) -> Result<Value<'gc>, Error<'gc>> {
-    if args.is_empty() {
-        return Ok(Value::Null);
-    }
-
-    let name = args.get(0).unwrap().coerce_to_string(activation)?;
-    if let Some(method) = activation
-        .context
-        .external_interface
-        .get_method_for(&name.to_utf8_lossy())
-    {
-        let mut external_args = Vec::with_capacity(args.len() - 1);
-        for arg in &args[1..] {
-            external_args.push(ExternalValue::from_avm2(arg.to_owned()));
-        }
-        Ok(method
-            .call(&mut activation.context, &external_args)
-            .into_avm2(activation))
-    } else {
-        Ok(Value::Null)
-    }
-}
-
-pub fn available<'gc>(
-    activation: &mut Activation<'_, 'gc, '_>,
-    _this: Option<Object<'gc>>,
-    _args: &[Value<'gc>],
-) -> Result<Value<'gc>, Error<'gc>> {
-    Ok(activation.context.external_interface.available().into())
-}
-
-pub fn add_callback<'gc>(
-    activation: &mut Activation<'_, 'gc, '_>,
-    _this: Option<Object<'gc>>,
-    args: &[Value<'gc>],
-) -> Result<Value<'gc>, Error<'gc>> {
-    if args.len() < 2 {
-        return Ok(Value::Undefined);
-    }
-
-    let name = args.get(0).unwrap().coerce_to_string(activation)?;
-    let method = args.get(1).unwrap();
-
-    if let Value::Object(method) = method {
-        activation
-            .context
-            .external_interface
-            .add_callback(name.to_string(), Callback::Avm2 { method: *method });
-    }
-    Ok(Value::Undefined)
-}
-
-/// Construct `ExternalInterface`'s class.
-pub fn create_class<'gc>(mc: MutationContext<'gc, '_>) -> GcCell<'gc, Class<'gc>> {
-    let class = Class::new(
-        QName::new(Namespace::package("flash.external"), "ExternalInterface"),
-        Some(Multiname::public("Object")),
-        Method::from_builtin(
-            instance_init,
-            "<ExternalInterface instance initializer>",
-            mc,
-        ),
-        Method::from_builtin(class_init, "<ExternalInterface class initializer>", mc),
-        mc,
-    );
-
-    let mut write = class.write(mc);
-    write.set_attributes(ClassAttributes::FINAL | ClassAttributes::SEALED);
-
-    const PUBLIC_CLASS_METHODS: &[(&str, NativeMethodImpl)] =
-        &[("call", call), ("addCallback", add_callback)];
-
-    write.define_public_builtin_class_methods(mc, PUBLIC_CLASS_METHODS);
-
-    const PUBLIC_INSTANCE_PROPERTIES: &[(
-        &str,
-        Option<NativeMethodImpl>,
-        Option<NativeMethodImpl>,
-    )] = &[("available", Some(available), None)];
-
-    write.define_public_builtin_class_properties(mc, PUBLIC_INSTANCE_PROPERTIES);
-
-    class
-}
diff --git a/core/src/avm2/globals/globals.as b/core/src/avm2/globals/globals.as
index eaf332d69..726ab8564 100644
--- a/core/src/avm2/globals/globals.as
+++ b/core/src/avm2/globals/globals.as
@@ -163,6 +163,8 @@ include "flash/media/StageVideoAvailabilityReason.as"
 include "flash/media/VideoCodec.as"
 include "flash/media/VideoStatus.as"
 
+include "flash/external/ExternalInterface.as"
+
 include "flash/net.as"
 include "flash/net/FileFilter.as"
 include "flash/net/FileReference.as"