diff --git a/doc/ot_api_doc.h b/doc/ot_api_doc.h
index e67489c71..f0762eb0c 100644
--- a/doc/ot_api_doc.h
+++ b/doc/ot_api_doc.h
@@ -84,7 +84,7 @@
  * @defgroup api-message              Message
  *
  * @defgroup api-multi-radio          Multi Radio Link
- * @defgroup api-trel                 TREL
+ * @defgroup api-trel                 TREL - Thread Stack
  *
  * @defgroup api-thread               Thread
  *
@@ -167,7 +167,7 @@
  * @defgroup plat-spi-slave           SPI Slave
  * @defgroup plat-time                Time Service
  * @defgroup plat-toolchain           Toolchain
- * @defgroup plat-trel                TREL
+ * @defgroup plat-trel                TREL - Platform
  *
  * @}
  *
diff --git a/include/openthread/instance.h b/include/openthread/instance.h
index 71f5d39e0..271378edc 100644
--- a/include/openthread/instance.h
+++ b/include/openthread/instance.h
@@ -53,7 +53,7 @@ extern "C" {
  * @note This number versions both OpenThread platform and user APIs.
  *
  */
-#define OPENTHREAD_API_VERSION (189)
+#define OPENTHREAD_API_VERSION (190)
 
 /**
  * @addtogroup api-instance
diff --git a/include/openthread/trel.h b/include/openthread/trel.h
index d8ee67f7f..e2dcbdbe4 100644
--- a/include/openthread/trel.h
+++ b/include/openthread/trel.h
@@ -48,9 +48,9 @@ extern "C" {
  * @addtogroup api-trel
  *
  * @brief
- *   This file defines Thread Radio Encapsulation Link (TREL) APIs for Thread Over Infrastructure.
+ *   This module defines Thread Radio Encapsulation Link (TREL) APIs for Thread Over Infrastructure.
  *
- *   The functions in this file require `OPENTHREAD_CONFIG_RADIO_LINK_TREL_ENABLE` to be enabled.
+ *   The functions in this module require `OPENTHREAD_CONFIG_RADIO_LINK_TREL_ENABLE` to be enabled.
  *
  * @{
  *