diff --git a/core/src/avm2/globals/flash/display/Stage.as b/core/src/avm2/globals/flash/display/Stage.as
index a5daacb77242..9c579550aa49 100644
--- a/core/src/avm2/globals/flash/display/Stage.as
+++ b/core/src/avm2/globals/flash/display/Stage.as
@@ -15,6 +15,7 @@ package flash.display {
     [Ruffle(NativeInstanceInit)]
     public class Stage extends DisplayObjectContainer {
         private var _colorCorrection:String = ColorCorrection.DEFAULT;
+        private var _mouseLock:Boolean = false;
 
         public function Stage() {
             throw new Error("You cannot construct new instances of the Stage.")
@@ -267,5 +268,15 @@ package flash.display {
             stub_getter("flash.display.Stage", "colorCorrectionSupport");
             return ColorCorrectionSupport.UNSUPPORTED;
         }
+
+        public function get mouseLock():Boolean {
+            stub_getter("flash.display.Stage", "mouseLock");
+            return this._mouseLock;
+        }
+
+        public function set mouseLock(value:Boolean):void {
+            stub_setter("flash.display.Stage", "mouseLock");
+            this._mouseLock = value;
+        }
     }
 }