diff --git a/src/wp-includes/customize/class-wp-customize-partial.php b/src/wp-includes/customize/class-wp-customize-partial.php
index c27b3f058c..458fa1ad9f 100644
--- a/src/wp-includes/customize/class-wp-customize-partial.php
+++ b/src/wp-includes/customize/class-wp-customize-partial.php
@@ -272,9 +272,12 @@ class WP_Customize_Partial {
 	 * @since 4.5.0
 	 * @access public
 	 *
+	 * @param WP_Customize_Partial $partial Partial.
+	 * @param array                $context Context.
 	 * @return string|array|false
 	 */
-	public function render_callback() {
+	public function render_callback( WP_Customize_Partial $partial, $context = array() ) {
+		unset( $partial, $context );
 		return false;
 	}
 
diff --git a/tests/phpunit/tests/customize/partial.php b/tests/phpunit/tests/customize/partial.php
index 2609c7e3fd..944cb4e2b7 100644
--- a/tests/phpunit/tests/customize/partial.php
+++ b/tests/phpunit/tests/customize/partial.php
@@ -268,8 +268,8 @@ class Test_WP_Customize_Partial extends WP_UnitTestCase {
 	 */
 	function test_render_callback_default() {
 		$partial = new WP_Customize_Partial( $this->selective_refresh, 'foo' );
-		$this->assertFalse( $partial->render_callback() );
-		$this->assertFalse( call_user_func( $partial->render_callback ) );
+		$this->assertFalse( $partial->render_callback( $partial, array() ) );
+		$this->assertFalse( call_user_func( $partial->render_callback, $partial, array() ) );
 	}
 
 	/**