diff --git a/src/wp-includes/blocks.php b/src/wp-includes/blocks.php
index c60ddf18e0..905cb48b37 100644
--- a/src/wp-includes/blocks.php
+++ b/src/wp-includes/blocks.php
@@ -164,7 +164,7 @@ function register_block_style_handle( $metadata, $field_name ) {
 	$block_dir      = dirname( $metadata['file'] );
 	$style_file     = realpath( "$block_dir/$style_path" );
 	$has_style_file = false !== $style_file;
-	$version        = ! $is_core_block && $has_style_file ? filemtime( $style_file ) : false;
+	$version        = ! $is_core_block && isset( $metadata['version'] ) ? $metadata['version'] : false;
 	$style_uri      = $has_style_file ? $style_uri : false;
 	$result         = wp_register_style(
 		$style_handle,