diff --git a/wp-includes/blocks.php b/wp-includes/blocks.php
index c94a5d5e5e..a7919090cf 100644
--- a/wp-includes/blocks.php
+++ b/wp-includes/blocks.php
@@ -116,7 +116,7 @@ function register_block_script_handle( $metadata, $field_name ) {
 		return false;
 	}
 
-	if ( ! empty( $metadata['textdomain'] ) && in_array( 'wp-i18n', $script_dependencies ) ) {
+	if ( ! empty( $metadata['textdomain'] ) && in_array( 'wp-i18n', $script_dependencies, true ) ) {
 		wp_set_script_translations( $script_handle, $metadata['textdomain'] );
 	}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 6ba3669969..98c94d6878 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-51887';
+$wp_version = '5.9-alpha-51888';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.