diff --git a/src/setting.h b/src/setting.h
index 5f09d1d..b78d40e 100644
--- a/src/setting.h
+++ b/src/setting.h
@@ -81,8 +81,8 @@ class SettingChanges : private noncopyable {
       return *this;
 
     clear();
-    m_settingChanges = std::move(rhs.m_settingChanges);
-    rhs.m_settingChanges.clear();
+    std::swap(m_settingChanges, rhs.m_settingChanges);
+
     return *this;
   }