diff --git a/Lib/threading.py b/Lib/threading.py
index 7bc8a8573c7289..000981f6d9633f 100644
--- a/Lib/threading.py
+++ b/Lib/threading.py
@@ -1007,7 +1007,7 @@ def join(self, timeout=None):
         When the timeout argument is present and not None, it should be a
         floating point number specifying a timeout for the operation in seconds
         (or fractions thereof). As join() always returns None, you must call
-        isAlive() after join() to decide whether a timeout happened -- if the
+        is_alive() after join() to decide whether a timeout happened -- if the
         thread is still alive, the join() call timed out.
 
         When the timeout argument is not present or None, the operation will