diff --git a/wp-includes/class-wp-image-editor-imagick.php b/wp-includes/class-wp-image-editor-imagick.php
index b35e02a873..ae91e46970 100644
--- a/wp-includes/class-wp-image-editor-imagick.php
+++ b/wp-includes/class-wp-image-editor-imagick.php
@@ -205,12 +205,12 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
 				case 'image/webp':
 					$webp_info = wp_get_webp_info( $this->file );
 
-					if ( 'lossy' === $webp_info['type'] ) {
-						$this->image->setImageCompressionQuality( $quality );
-					} else {
+					if ( 'lossless' === $webp_info['type'] ) {
 						// Use WebP lossless settings.
 						$this->image->setImageCompressionQuality( 100 );
 						$this->image->setOption( 'webp:lossless', 'true' );
+					} else {
+						$this->image->setImageCompressionQuality( $quality );
 					}
 					break;
 				default:
diff --git a/wp-includes/version.php b/wp-includes/version.php
index edc30ac602..a8f08481f2 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-51434';
+$wp_version = '5.9-alpha-51435';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.