diff --git a/wp-includes/class-json.php b/wp-includes/class-json.php
index 036150f1d8..147cdcb8cd 100644
--- a/wp-includes/class-json.php
+++ b/wp-includes/class-json.php
@@ -1,5 +1,5 @@
 <?php
-_deprecated_file( basename( __FILE__ ), '5.3.0', null, 'The PHP native JSON extension is now a requirement.' );
+_deprecated_file( basename( __FILE__ ), '5.3.0', '', 'The PHP native JSON extension is now a requirement.' );
 
 if ( ! class_exists( 'Services_JSON' ) ) :
 /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
diff --git a/wp-includes/registration-functions.php b/wp-includes/registration-functions.php
index 347856e543..8dda8f844a 100644
--- a/wp-includes/registration-functions.php
+++ b/wp-includes/registration-functions.php
@@ -6,4 +6,4 @@
  * @deprecated 2.1.0
  */
 
-_deprecated_file( basename( __FILE__ ), '2.1.0', null, __( 'This file no longer needs to be included.' ) );
+_deprecated_file( basename( __FILE__ ), '2.1.0', '', __( 'This file no longer needs to be included.' ) );
diff --git a/wp-includes/registration.php b/wp-includes/registration.php
index a676e730b1..1e35b09bdc 100644
--- a/wp-includes/registration.php
+++ b/wp-includes/registration.php
@@ -6,4 +6,4 @@
  * @deprecated 3.1.0
  */
 
-_deprecated_file( basename( __FILE__ ), '3.1.0', null, __( 'This file no longer needs to be included.' ) );
+_deprecated_file( basename( __FILE__ ), '3.1.0', '', __( 'This file no longer needs to be included.' ) );
diff --git a/wp-includes/spl-autoload-compat.php b/wp-includes/spl-autoload-compat.php
index 982d9c2a83..29399d42b9 100644
--- a/wp-includes/spl-autoload-compat.php
+++ b/wp-includes/spl-autoload-compat.php
@@ -11,4 +11,4 @@
  * @access private
  */
 
-_deprecated_file( basename( __FILE__ ), '5.3.0', null, 'SPL can no longer be disabled as of PHP 5.3.' );
+_deprecated_file( basename( __FILE__ ), '5.3.0', '', 'SPL can no longer be disabled as of PHP 5.3.' );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index a4b2083176..d5541f9711 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-beta3-49563';
+$wp_version = '5.6-beta3-49564';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.