diff --git a/includes/RestApi/Themes/ThemeVariationsController.php b/includes/RestApi/Themes/ThemeVariationsController.php
index e74bc0537..72a7ae288 100644
--- a/includes/RestApi/Themes/ThemeVariationsController.php
+++ b/includes/RestApi/Themes/ThemeVariationsController.php
@@ -135,8 +135,8 @@ public function get_update_diy_global_style_variation_args() {
 	 * @return string
 	 */
 	private static function translate( $theme_json, $domain = 'default' ) {
-			$i18n_schema = wp_json_file_decode( __DIR__ . '/theme-i18n.json' );
-
+		$path        = wp_normalize_path( realpath( ABSPATH . WPINC ) ) . '/theme-i18n.json';
+		$i18n_schema = wp_json_file_decode( $path );
 		return translate_settings_using_i18n_schema( $i18n_schema, $theme_json, $domain );
 	}