diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
index cf131adb67..6540c52fdf 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
@@ -867,6 +867,7 @@ class WP_REST_Terms_Controller extends WP_REST_Controller {
 			'description'       => __( 'Whether to hide resources not assigned to any posts.' ),
 			'type'              => 'boolean',
 			'default'           => false,
+			'sanitize_callback' => 'rest_sanitize_request_arg',
 			'validate_callback' => 'rest_validate_request_arg',
 		);
 		if ( $taxonomy->hierarchical ) {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e8fa15cf3c..e3b07b7696 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38941';
+$wp_version = '4.7-alpha-38942';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.