diff --git a/wp-admin/edit-form-blocks.php b/wp-admin/edit-form-blocks.php
index 5556bd7a62..6e353943b0 100644
--- a/wp-admin/edit-form-blocks.php
+++ b/wp-admin/edit-form-blocks.php
@@ -306,7 +306,7 @@ if ( false !== $color_palette ) {
 	$editor_settings['colors'] = $color_palette;
 }
 
-if ( ! empty( $font_sizes ) ) {
+if ( false !== $font_sizes ) {
 	$editor_settings['fontSizes'] = $font_sizes;
 }
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index cdb792f92a..e9b2e35f4e 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.2-alpha-44781';
+$wp_version = '5.2-alpha-44782';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.