Include structmember.h correctly.
diff --git a/Doc/extending/newtypes.rst b/Doc/extending/newtypes.rst
index e3cf66a..ba79260 100644
--- a/Doc/extending/newtypes.rst
+++ b/Doc/extending/newtypes.rst
@@ -252,7 +252,7 @@
 
 We've added an extra include::
 
-   #include "structmember.h"
+   #include <structmember.h>
 
 This include provides declarations that we use to handle attributes, as
 described a bit later.