diff --git a/examples/tetris/tetris.v b/examples/tetris/tetris.v
index 13cecc4346..ce99fc7534 100644
--- a/examples/tetris/tetris.v
+++ b/examples/tetris/tetris.v
@@ -2,6 +2,8 @@
 // Use of this source code is governed by an MIT license
 // that can be found in the LICENSE file.
 
+module main
+
 import rand
 import time
 import gx