diff --git a/Lib/genericpath.py b/Lib/genericpath.py
index db11f67..ce36451 100644
--- a/Lib/genericpath.py
+++ b/Lib/genericpath.py
@@ -149,7 +149,7 @@
         elif isinstance(s, bytes):
             hasbytes = True
         else:
-            raise TypeError('%s() argument must be str or bytes, not %r' %
-                            (funcname, s.__class__.__name__)) from None
+            raise TypeError(f'{funcname}() argument must be str, bytes, or '
+                            f'os.PathLike object, not {s.__class__.__name__!r}') from None
     if hasstr and hasbytes:
         raise TypeError("Can't mix strings and bytes in path components") from None
diff --git a/Misc/NEWS.d/next/Library/2019-11-15-09-30-29.bpo-38807.PsmRog.rst b/Misc/NEWS.d/next/Library/2019-11-15-09-30-29.bpo-38807.PsmRog.rst
new file mode 100644
index 0000000..2bd7e3d
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-11-15-09-30-29.bpo-38807.PsmRog.rst
@@ -0,0 +1 @@
+Update :exc:`TypeError` messages for :meth:`os.path.join` to include :class:`os.PathLike` objects as acceptable input types.
\ No newline at end of file