diff --git a/agents/cfg_examples/docker.cfg b/agents/cfg_examples/docker.cfg
index aec78258754..aa32a67c46c 100644
--- a/agents/cfg_examples/docker.cfg
+++ b/agents/cfg_examples/docker.cfg
@@ -45,7 +45,12 @@ skip_sections: docker_node_disk_usage,docker_node_images
 # container.
 # By default, the identifier is assumed to be the first 12 characters
 # of the container UUID. You can choose to use the full ID or the containers
-# name instead. Allowed values are "short" (the default), "long" and "name".
+# name instead. Allowed values are "short" (the default), "long" and "name"
+# and "combined":
+#  * short:    the first 12 characters of the container UUID (the default)
+#  * long:     the full container UUID
+#  * name:     the name of the container
+#  * combined: combine the node name and the name of the container
 container_id: name
 
 # BASE URL