diff --git a/lib/compat/wordpress-6.2/class-gutenberg-rest-global-styles-controller-6-2.php b/lib/compat/wordpress-6.2/class-gutenberg-rest-global-styles-controller-6-2.php
index 67d3be1952a5f..16e04cc26b3ff 100644
--- a/lib/compat/wordpress-6.2/class-gutenberg-rest-global-styles-controller-6-2.php
+++ b/lib/compat/wordpress-6.2/class-gutenberg-rest-global-styles-controller-6-2.php
@@ -221,7 +221,7 @@ public function get_theme_item( $request ) {
 			);
 		}
 
-		$theme  = WP_Theme_JSON_Resolver_6_2::get_merged_data( 'theme' );
+		$theme  = WP_Theme_JSON_Resolver_Gutenberg::get_merged_data( 'theme' );
 		$data   = array();
 		$fields = $this->get_fields_for_response( $request );