diff --git a/include/system_error b/include/system_error
index 805c6464..e9f2b55e 100644
--- a/include/system_error
+++ b/include/system_error
@@ -366,8 +366,8 @@ class _LIBCPP_VISIBLE error_category
 public:
     virtual ~error_category() _NOEXCEPT;
 
-private:
     error_category() _NOEXCEPT;
+private:
     error_category(const error_category&);// = delete;
     error_category& operator=(const error_category&);// = delete;