diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 935026b..14c80da 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -119,6 +119,14 @@ enum bpf_cgroup_iter_order {
 	BPF_CGROUP_ITER_DESCENDANTS_PRE,	/* walk descendants in pre-order. */
 	BPF_CGROUP_ITER_DESCENDANTS_POST,	/* walk descendants in post-order. */
 	BPF_CGROUP_ITER_ANCESTORS_UP,		/* walk ancestors upward. */
+	/*
+	 * Walks the immediate children of the specified parent
+	 * cgroup_subsys_state. Unlike BPF_CGROUP_ITER_DESCENDANTS_PRE,
+	 * BPF_CGROUP_ITER_DESCENDANTS_POST, and BPF_CGROUP_ITER_ANCESTORS_UP
+	 * the iterator does not include the specified parent as one of the
+	 * returned iterator elements.
+	 */
+	BPF_CGROUP_ITER_CHILDREN,
 };
 
 union bpf_iter_link_info {