diff --git a/bootstrap.txt b/bootstrap.txt
index 5edf95c..0d151ce 100644
--- a/bootstrap.txt
+++ b/bootstrap.txt
@@ -13,4 +13,8 @@ fun println() {
     apply(print, __arguments__);
     print("\n");
     __arguments__;
-}
\ No newline at end of file
+}
+
+fun millis() {
+    microseconds() / 1000;
+}