diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index fde06f0a73..7cb4b980fa 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -2444,7 +2444,7 @@ function enqueue_block_styles_assets() {
 				if ( wp_should_load_separate_core_block_assets() ) {
 					add_filter(
 						'render_block',
-						function( $html, $block ) use ( $style_properties ) {
+						function( $html ) use ( $style_properties ) {
 							wp_enqueue_style( $style_properties['style_handle'] );
 							return $html;
 						}