diff --git a/src/io/mouse.js b/src/io/mouse.js
index 1c7bb81e5d6..5d9c00fb915 100644
--- a/src/io/mouse.js
+++ b/src/io/mouse.js
@@ -59,19 +59,13 @@ class Mouse {
     postData (data) {
         if (data.x) {
             this._clientX = data.x;
-            this._scratchX = Math.round(MathUtil.clamp(
-                480 * ((data.x / data.canvasWidth) - 0.5),
-                -240,
-                240
-            ));
+            this._rawScratchX = 480 * ((data.x / data.canvasWidth) - 0.5);
+            this._scratchX = Math.round(MathUtil.clamp(this._rawScratchX, -240, 240));
         }
         if (data.y) {
             this._clientY = data.y;
-            this._scratchY = Math.round(MathUtil.clamp(
-                -360 * ((data.y / data.canvasHeight) - 0.5),
-                -180,
-                180
-            ));
+            this._rawScratchY = -360 * ((data.y / data.canvasHeight) - 0.5);
+            this._scratchY = Math.round(MathUtil.clamp(this._rawScratchY, -180, 180));
         }
         if (typeof data.isDown !== 'undefined') {
             const previousDownState = this._isDown;
@@ -133,6 +127,19 @@ class Mouse {
         return this._scratchY;
     }
 
+    /**
+     * Check if the mouse is outside the stage.
+     * @return {boolean} Is the mouse outside the stage?
+     */
+    getIsOutside () {
+        return !(
+            this._rawScratchX >= -240 &&
+            this._rawScratchX <= 240 &&
+            this._rawScratchY >= -180 &&
+            this._rawScratchY <= 180
+        );
+    }
+
     /**
      * Get the down state of the mouse.
      * @return {boolean} Is the mouse down?
diff --git a/src/sprites/rendered-target.js b/src/sprites/rendered-target.js
index 018f7cd16bb..5902ccc6f98 100644
--- a/src/sprites/rendered-target.js
+++ b/src/sprites/rendered-target.js
@@ -777,6 +777,7 @@ class RenderedTarget extends Target {
     isTouchingObject (requestedObject) {
         if (requestedObject === '_mouse_') {
             if (!this.runtime.ioDevices.mouse) return false;
+            if (this.runtime.ioDevices.mouse.getIsOutside()) return false;
             const mouseX = this.runtime.ioDevices.mouse.getClientX();
             const mouseY = this.runtime.ioDevices.mouse.getClientY();
             return this.isTouchingPoint(mouseX, mouseY);
diff --git a/test/unit/sprites_rendered-target.js b/test/unit/sprites_rendered-target.js
index 20430008b37..f0e51b18a5d 100644
--- a/test/unit/sprites_rendered-target.js
+++ b/test/unit/sprites_rendered-target.js
@@ -280,6 +280,39 @@ test('isTouchingPoint', t => {
     t.end();
 });
 
+test('isTouchingObjectOutsideStage', t => {
+    const r = new Runtime();
+    const s = new Sprite(null, r);
+    const renderer = new FakeRenderer();
+    r.attachRenderer(renderer);
+    const a = new RenderedTarget(s, r);
+    a.renderer = renderer;
+    r.ioDevices.mouse.postData({
+        x: 1000,
+        y: -300
+    });
+    t.equals(a.isTouchingObject('_mouse_'), false);
+    t.end();
+});
+
+test('isTouchingMouse', t => {
+    const r = new Runtime();
+    const s = new Sprite(null, r);
+    const renderer = new FakeRenderer();
+    r.attachRenderer(renderer);
+    const a = new RenderedTarget(s, r);
+    a.renderer = renderer;
+    // (0, 0) is the top left, and (canvasWidth, canvasHeight) is the bottom right
+    r.ioDevices.mouse.postData({
+        canvasHeight: 360,
+        canvasWidth: 480,
+        x: 240,
+        y: 180
+    });
+    t.equals(a.isTouchingObject('_mouse_'), true);
+    t.end();
+});
+
 test('isTouchingEdge', t => {
     const r = new Runtime();
     const s = new Sprite(null, r);