diff --git a/pep-0418/clock_precision.py b/pep-0418/clock_precision.py
index c8c57d494..39629e1dc 100644
--- a/pep-0418/clock_precision.py
+++ b/pep-0418/clock_precision.py
@@ -36,7 +36,11 @@ def test_clock(name, func):
     print("- precision in Python: %s" % format_duration(precision))
 
 
-for name in ('clock', 'perf_counter', 'process_time', 'monotonic', 'time'):
+clocks = ('clock', 'perf_counter', 'process_time')
+if hasattr(time, 'monotonic'):
+    clocks.append('monotonic')
+clocks.append('time')
+for name in clocks:
     func = getattr(time, name)
     test_clock("%s()" % name, func)
     info = time.get_clock_info(name)