diff --git a/wp-admin/includes/class-plugin-upgrader.php b/wp-admin/includes/class-plugin-upgrader.php
index 27dc757f19..c750399277 100644
--- a/wp-admin/includes/class-plugin-upgrader.php
+++ b/wp-admin/includes/class-plugin-upgrader.php
@@ -406,13 +406,14 @@ class Plugin_Upgrader extends WP_Upgrader {
 	 * @since 3.3.0
 	 *
 	 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
+	 * @global string             $wp_version    The WordPress version string.
 	 *
 	 * @param string $source The path to the downloaded package source.
 	 * @return string|WP_Error The source as passed, or a WP_Error object
 	 *                         if no plugins were found.
 	 */
 	public function check_package( $source ) {
-		global $wp_filesystem;
+		global $wp_filesystem, $wp_version;
 
 		$this->new_plugin_data = array();
 
@@ -459,7 +460,7 @@ class Plugin_Upgrader extends WP_Upgrader {
 			$error = sprintf(
 				/* translators: 1: Current WordPress version, 2: Version required by the uploaded plugin. */
 				__( 'Your WordPress version is %1$s, however the uploaded plugin requires %2$s.' ),
-				$GLOBALS['wp_version'],
+				$wp_version,
 				$requires_wp
 			);
 
diff --git a/wp-admin/includes/class-theme-upgrader.php b/wp-admin/includes/class-theme-upgrader.php
index c08d3c2d5c..3c8f2d9abf 100644
--- a/wp-admin/includes/class-theme-upgrader.php
+++ b/wp-admin/includes/class-theme-upgrader.php
@@ -519,12 +519,13 @@ class Theme_Upgrader extends WP_Upgrader {
 	 * @since 3.3.0
 	 *
 	 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
+	 * @global string             $wp_version    The WordPress version string.
 	 *
 	 * @param string $source The full path to the package source.
 	 * @return string|WP_Error The source or a WP_Error.
 	 */
 	public function check_package( $source ) {
-		global $wp_filesystem;
+		global $wp_filesystem, $wp_version;
 
 		$this->new_theme_data = array();
 
@@ -606,7 +607,7 @@ class Theme_Upgrader extends WP_Upgrader {
 			$error = sprintf(
 				/* translators: 1: Current WordPress version, 2: Version required by the uploaded theme. */
 				__( 'Your WordPress version is %1$s, however the uploaded theme requires %2$s.' ),
-				$GLOBALS['wp_version'],
+				$wp_version,
 				$requires_wp
 			);
 
diff --git a/wp-includes/default-constants.php b/wp-includes/default-constants.php
index 77f76319b8..bb57b96536 100644
--- a/wp-includes/default-constants.php
+++ b/wp-includes/default-constants.php
@@ -16,7 +16,7 @@
  * @global string $wp_version The WordPress version string.
  */
 function wp_initial_constants() {
-	global $blog_id;
+	global $blog_id, $wp_version;
 
 	/**#@+
 	 * Constants for expressing human-readable data sizes in their respective number of bytes.
@@ -99,8 +99,8 @@ function wp_initial_constants() {
 	// Add define( 'SCRIPT_DEBUG', true ); to wp-config.php to enable loading of non-minified,
 	// non-concatenated scripts and stylesheets.
 	if ( ! defined( 'SCRIPT_DEBUG' ) ) {
-		if ( ! empty( $GLOBALS['wp_version'] ) ) {
-			$develop_src = false !== strpos( $GLOBALS['wp_version'], '-src' );
+		if ( ! empty( $wp_version ) ) {
+			$develop_src = false !== strpos( $wp_version, '-src' );
 		} else {
 			$develop_src = false;
 		}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index d7117ad360..079721ada3 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-alpha-48970';
+$wp_version = '5.6-alpha-48971';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.