diff --git a/include/openthread/openthread.h b/include/openthread/openthread.h
index ed0e2d729..80ba37c52 100644
--- a/include/openthread/openthread.h
+++ b/include/openthread/openthread.h
@@ -111,6 +111,7 @@ extern "C" {
  *
  * @{
  *
+ * @defgroup api-channel-manager     Channel Manager
  * @defgroup api-channel-monitor     Channel Monitoring
  * @defgroup api-child-supervision   Child Supervision
  * @defgroup api-coap                CoAP