diff --git a/Lib/macpath.py b/Lib/macpath.py
index 5317c36..71748c9 100644
--- a/Lib/macpath.py
+++ b/Lib/macpath.py
@@ -98,6 +98,17 @@
 		return 0
 	return 1
 
+#
+# dummy expandvars to retain interface-compatability with other
+# operating systems.
+def expandvars(path):
+	return path
+
+#
+# dummy expanduser to retain interface-compatability with other
+# operating systems.
+def expanduser(path):
+	return path
 
 # Normalize a pathname: get rid of '::' sequences by backing up,
 # e.g., 'foo:bar::bletch' becomes 'foo:bletch'.