diff --git a/Include/pyatomic.h b/Include/pyatomic.h
--- a/Include/pyatomic.h
+++ b/Include/pyatomic.h
@@ -64,6 +64,8 @@ _Py_ANNOTATE_MEMORY_ORDER(const volatile
     case _Py_memory_order_seq_cst:
         _Py_ANNOTATE_HAPPENS_BEFORE(address);
         break;
+    case _Py_memory_order_relaxed:
+    case _Py_memory_order_acquire:
     default:
         break;
     }
@@ -73,6 +75,8 @@ _Py_ANNOTATE_MEMORY_ORDER(const volatile
     case _Py_memory_order_seq_cst:
         _Py_ANNOTATE_HAPPENS_AFTER(address);
         break;
+    case _Py_memory_order_relaxed:
+    case _Py_memory_order_release:
     default:
         break;
     }