Merge branches/pep-0384.
diff --git a/Include/pyatomic.h b/Include/pyatomic.h
index 7d3449d..b0028fd 100644
--- a/Include/pyatomic.h
+++ b/Include/pyatomic.h
@@ -1,3 +1,4 @@
+#ifndef Py_LIMITED_API
 #ifndef Py_ATOMIC_H
 #define Py_ATOMIC_H
 /* XXX: When compilers start offering a stdatomic.h with lock-free
@@ -177,3 +178,4 @@
 #endif
 
 #endif  /* Py_ATOMIC_H */
+#endif  /* Py_LIMITED_API */