diff --git a/source/Concepts/About-Domain-ID.rst b/source/Concepts/About-Domain-ID.rst
index ab804b4785d..7e626ee17e0 100644
--- a/source/Concepts/About-Domain-ID.rst
+++ b/source/Concepts/About-Domain-ID.rst
@@ -1,3 +1,4 @@
+.. _concepts_domain_id_ros_domain_id:
 
 The ROS_DOMAIN_ID
 =================
diff --git a/source/Concepts/About-Quality-of-Service-Settings.rst b/source/Concepts/About-Quality-of-Service-Settings.rst
index 23c7d409654..096fef4862d 100644
--- a/source/Concepts/About-Quality-of-Service-Settings.rst
+++ b/source/Concepts/About-Quality-of-Service-Settings.rst
@@ -2,6 +2,8 @@
 
     About-Quality-of-Service-Settings
 
+.. _concepts_about_qos:
+
 About Quality of Service settings
 =================================