diff --git a/SimpleStopWatch.py b/SimpleStopWatch.py
index 465e89fa8ea..4d6791ff6eb 100644
--- a/SimpleStopWatch.py
+++ b/SimpleStopWatch.py
@@ -6,7 +6,7 @@
 print('Press ENTER to begin, Press Ctrl + C to stop')
 while True:
     try:
-        input() #For ENTER
+        input() # For ENTER. Use raw_input() if you are running python 2.x instead of input()
         starttime = time.time()
         print('Started')
     except KeyboardInterrupt: