diff -r d7c31c73b1bd Doc/library/csv.rst
--- a/Doc/library/csv.rst	Sun Sep 04 12:31:47 2016 +0100
+++ b/Doc/library/csv.rst	Sun Sep 04 22:18:24 2016 +0530
@@ -464,7 +464,8 @@
 
 .. method:: DictWriter.writeheader()
 
-   Write a row with the field names (as specified in the constructor).
+   Write a row with the field names (as specified in the constructor) to
+   the writer's file object, formatted according to the current dialect.
 
    .. versionadded:: 3.2
 
diff -r d7c31c73b1bd Lib/csv.py
--- a/Lib/csv.py	Sun Sep 04 12:31:47 2016 +0100
+++ b/Lib/csv.py	Sun Sep 04 22:18:24 2016 +0530
@@ -141,7 +141,7 @@
 
     def writeheader(self):
         header = dict(zip(self.fieldnames, self.fieldnames))
-        self.writerow(header)
+        return self.writerow(header)
 
     def _dict_to_list(self, rowdict):
         if self.extrasaction == "raise":