diff --git a/include/net/mii.h b/include/net/mii.h
index 6a979da5540..042a49ff032 100644
--- a/include/net/mii.h
+++ b/include/net/mii.h
@@ -12,7 +12,9 @@
 #define ZEPHYR_INCLUDE_NET_MII_H_
 
 /**
- * @addtogroup ethernet
+ * @brief Ethernet MII (media independent interface) functions
+ * @defgroup ethernet_mii Ethernet MII Support Functions
+ * @ingroup ethernet
  * @{
  */