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	Mon Sep 05 20:45:46 2016 +0530
@@ -464,9 +464,13 @@
 
 .. 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
+   .. versionchanged:: 3.6
+      :meth:`writeheader` now also *returns* the value returned by
+      the :meth:`csvwriter.writerow` method it uses internally.
 
 
 .. _csv-examples:
diff -r d7c31c73b1bd Lib/csv.py
--- a/Lib/csv.py	Sun Sep 04 12:31:47 2016 +0100
+++ b/Lib/csv.py	Mon Sep 05 20:45:46 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":
diff -r d7c31c73b1bd Lib/test/test_csv.py
--- a/Lib/test/test_csv.py	Sun Sep 04 12:31:47 2016 +0100
+++ b/Lib/test/test_csv.py	Mon Sep 05 20:45:46 2016 +0530
@@ -589,6 +589,15 @@
 class TestDictFields(unittest.TestCase):
     ### "long" means the row is longer than the number of fieldnames
     ### "short" means there are fewer elements in the row than fieldnames
+    def test_writeheader_return_value(self):
+        with TemporaryFile("w+", newline='') as fileobj:
+            writer = csv.DictWriter(fileobj, fieldnames = ["f1", "f2", "f3"])
+            writeheader_return_value = writer.writeheader()
+            writerow_return_value = writer.writerow({"f1": 10, "f3": "abc"})
+            self.assertIsNotNone(writeheader_return_value)
+            self.assertIsInstance(writeheader_return_value,
+                                  type(writerow_return_value))
+
     def test_write_simple_dict(self):
         with TemporaryFile("w+", newline='') as fileobj:
             writer = csv.DictWriter(fileobj, fieldnames = ["f1", "f2", "f3"])