diff --git a/src/testdir/test_writefile.vim b/src/testdir/test_writefile.vim
index 9703323b0..b8e0001f7 100644
--- a/src/testdir/test_writefile.vim
+++ b/src/testdir/test_writefile.vim
@@ -100,3 +100,11 @@ func Test_writefile_sync_arg()
   call writefile(['two'], 'Xtest', 'S')
   call delete('Xtest')
 endfunc
+
+func Test_writefile_sync_dev_stdout()
+  if !has('unix')
+    return
+  endif
+  " Just check that this doesn't cause an error.
+  call writefile(['one'], '/dev/stdout')
+endfunc
diff --git a/src/version.c b/src/version.c
index 8cce07899..32c83c8e1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1339,
 /**/
     1338,
 /**/