diff --git a/Doc/library/os.path.rst b/Doc/library/os.path.rst
index 4867e8b..62bbdff 100644
--- a/Doc/library/os.path.rst
+++ b/Doc/library/os.path.rst
@@ -196,10 +196,11 @@
    path, all previous components (on Windows, including the previous drive letter,
    if there was one) are thrown away, and joining continues.  The return value is
    the concatenation of *path1*, and optionally *path2*, etc., with exactly one
-   directory separator (``os.sep``) inserted between components, unless *path2* is
-   empty.  Note that on Windows, since there is a current directory for each drive,
-   ``os.path.join("c:", "foo")`` represents a path relative to the current
-   directory on drive :file:`C:` (:file:`c:foo`), not :file:`c:\\foo`.
+   directory separator (``os.sep``) following each non-empty part except the last.
+   (This means that an empty last part will result in a path that ends with a
+   separator.)  Note that on Windows, since there is a current directory for
+   each drive, ``os.path.join("c:", "foo")`` represents a path relative to the
+   current directory on drive :file:`C:` (:file:`c:foo`), not :file:`c:\\foo`.
 
 
 .. function:: normcase(path)