diff --git a/drivers/include/can/doc.txt b/drivers/include/can/doc.txt
index ef37e8b5a12f..f44698c15f3b 100644
--- a/drivers/include/can/doc.txt
+++ b/drivers/include/can/doc.txt
@@ -3,4 +3,7 @@
  * @ingroup     drivers_netdev
  * @brief       Drivers for CAN devices
  * @see         sys_can
+ *
+ * @note        These devices are not covered by the @ref drivers_netdev API
+ *              but by the @ref drivers_candev API.
  */
diff --git a/sys/include/can/common.h b/sys/include/can/common.h
index b429fd666ac1..d6104990edf4 100644
--- a/sys/include/can/common.h
+++ b/sys/include/can/common.h
@@ -7,7 +7,7 @@
  */
 
 /**
- * @defgroup   sys_can_common  Common
+ * @defgroup   sys_can_common  Common definitions
  * @ingroup    sys_can
  * @brief      CAN stack common definitions
  *
diff --git a/sys/include/can/isotp.h b/sys/include/can/isotp.h
index 6169ba729592..dc3ffd26a34f 100644
--- a/sys/include/can/isotp.h
+++ b/sys/include/can/isotp.h
@@ -7,7 +7,7 @@
  */
 
 /**
- * @defgroup    sys_can_isotp ISOTP
+ * @defgroup    sys_can_isotp ISO transport protocol over CAN (ISO15765)
  * @ingroup     sys_can
  * @brief       ISO transport protocol over CAN (ISO15765)
  * @{