diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 9497777..984484c 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -223,6 +223,14 @@
         except TypeError:
             pass
 
+    # Restrict test to Win32, since there is no guarantee other
+    # systems support centiseconds
+    if sys.platform == 'win32':
+        def test_1565150(self):
+            t1 = 1159195039.25
+            os.utime(self.fname, (t1, t1))
+            self.assertEquals(os.stat(self.fname).st_mtime, t1)
+
 from test import mapping_tests
 
 class EnvironTests(mapping_tests.BasicTestMappingProtocol):
diff --git a/Misc/NEWS b/Misc/NEWS
index 0b9aade..760dc1e 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -75,6 +75,8 @@
 Library
 -------
 
+- Bug #1565150: Fix subsecond processing for os.utime on Windows.
+
 - Support for MSVC 8 was added to bdist_wininst.
 
 - Bug #1446043: correctly raise a LookupError if an encoding name given
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 45ea988..93d0300 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -792,7 +792,7 @@
 	/* XXX endianness */
 	__int64 out;
 	out = time_in + secs_between_epochs;
-	out = out * 10000000 + nsec_in;
+	out = out * 10000000 + nsec_in / 100;
 	memcpy(out_ptr, &out, sizeof(out));
 }
 
@@ -2501,11 +2501,11 @@
 		if (extract_time(PyTuple_GET_ITEM(arg, 0),
 				 &atimesec, &ausec) == -1)
 			goto done;
-		time_t_to_FILE_TIME(atimesec, ausec, &atime);
+		time_t_to_FILE_TIME(atimesec, 1000*ausec, &atime);
 		if (extract_time(PyTuple_GET_ITEM(arg, 1),
 				 &mtimesec, &musec) == -1)
 			goto done;
-		time_t_to_FILE_TIME(mtimesec, musec, &mtime);
+		time_t_to_FILE_TIME(mtimesec, 1000*musec, &mtime);
 	}
 	if (!SetFileTime(hFile, NULL, &atime, &mtime)) {
 		/* Avoid putting the file name into the error here,