diff -r 4243df51fe43 Lib/pathlib.py
--- a/Lib/pathlib.py	Fri Feb 10 14:19:36 2017 +0100
+++ b/Lib/pathlib.py	Tue Mar 07 07:38:42 2017 +0100
@@ -1237,8 +1237,8 @@
             except OSError as e:
                 if e.errno != ENOENT or self.parent == self:
                     raise
-                self.parent.mkdir(parents=True)
-                self._accessor.mkdir(self, mode)
+                self.parent.mkdir(parents=True, exist_ok=True)
+                self.mkdir(mode, parents=False, exist_ok=exist_ok)
 
     def chmod(self, mode):
         """