diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 6a2fede355..8e17499be0 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -5636,7 +5636,7 @@ function get_file_data( $file, $default_headers, $context = '' ) {
 	$fp = fopen( $file, 'r' );
 
 	// Pull only the first 8kiB of the file in.
-	$file_data = fread( $fp, 8192 );
+	$file_data = fread( $fp, 8 * KB_IN_BYTES );
 
 	// PHP will close file handle, but we are good citizens.
 	fclose( $fp );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ed2a327ac1..2346c41f22 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45853';
+$wp_version = '5.3-alpha-45854';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.