diff --git a/index.d.ts b/index.d.ts
index 509a0ea0..4ca9cd93 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -36,6 +36,10 @@ declare namespace browserslist {
      * Do not throw on unknown version in direct query.
      */
     ignoreUnknownVersions?: boolean
+    /**
+     * Throw a error if env is not found.
+     */
+    throwOnMissing?: boolean
     /**
      * Disable security checks for extend query.
      */