diff --git a/system/modules/generalDriver/DcGeneral/DataDefinition/Palette/Palette.php b/system/modules/generalDriver/DcGeneral/DataDefinition/Palette/Palette.php
index <HASH>..<HASH> 100644
--- a/system/modules/generalDriver/DcGeneral/DataDefinition/Palette/Palette.php
+++ b/system/modules/generalDriver/DcGeneral/DataDefinition/Palette/Palette.php
@@ -65,7 +65,7 @@ class Palette implements PaletteInterface
 	/**
 	 * {@inheritdoc}
 	 */
-	public function getProperties(ModelInterface $model = null, PropertyValueBag $input)
+	public function getProperties(ModelInterface $model = null, PropertyValueBag $input = null)
 	{
 		$properties = array();
 
diff --git a/system/modules/generalDriver/DcGeneral/DataDefinition/Palette/PaletteInterface.php b/system/modules/generalDriver/DcGeneral/DataDefinition/Palette/PaletteInterface.php
index <HASH>..<HASH> 100644
--- a/system/modules/generalDriver/DcGeneral/DataDefinition/Palette/PaletteInterface.php
+++ b/system/modules/generalDriver/DcGeneral/DataDefinition/Palette/PaletteInterface.php
@@ -48,7 +48,7 @@ interface PaletteInterface
 	 *
 	 * @return PropertyInterface[]
 	 */
-	public function getProperties(ModelInterface $model = null, PropertyValueBag $input);
+	public function getProperties(ModelInterface $model = null, PropertyValueBag $input = null);
 
 	/**
 	 * Clear all legends from this palette.
Allow propertyBag in Palette::getProperties() also to be null.