diff --git a/packages/dev/gui/src/2D/controls/colorpicker.ts b/packages/dev/gui/src/2D/controls/colorpicker.ts
index e97e7abe7eb..1d2159e71d9 100644
--- a/packages/dev/gui/src/2D/controls/colorpicker.ts
+++ b/packages/dev/gui/src/2D/controls/colorpicker.ts
@@ -87,7 +87,7 @@ export class ColorPicker extends Control {
             this._value.b = 1.0;
         }
 
-        this.onValueChangedObservable.notifyObservers(this._value);
+        this.onValueChangedObservable.notifyObservers(this._value, undefined, this, this);
     }
 
     /**