diff --git a/wasp/boards/simulator/watch.py b/wasp/boards/simulator/watch.py
index 860c414..14bf59e 100644
--- a/wasp/boards/simulator/watch.py
+++ b/wasp/boards/simulator/watch.py
@@ -5,6 +5,9 @@ import time
 def sleep_ms(ms):
     time.sleep(ms / 1000)
 time.sleep_ms = sleep_ms
+time.ticks_ms = lambda : int(time.time() * 1000)
+time.ticks_us = lambda : int(time.time() * 1000 * 1000)
+time.ticks_diff = lambda x, y : x-y
 
 import sys, traceback
 def print_exception(exc, file=sys.stdout):