diff --git a/Lib/calendar.py b/Lib/calendar.py
index 2e45e244bed..a8735b9307a 100644
--- a/Lib/calendar.py
+++ b/Lib/calendar.py
@@ -95,7 +95,7 @@ month_abbr = _localized_month('%b')
 
 
 def isleap(year):
-    """Return 1 for leap years, 0 for non-leap years."""
+    """Return True for leap years, False for non-leap years."""
     return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)