diff --git a/drivers/include/mii.h b/drivers/include/mii.h
index 336f564041..b36825bbf0 100644
--- a/drivers/include/mii.h
+++ b/drivers/include/mii.h
@@ -119,6 +119,13 @@ extern "C" {
 #define MII_LPA_10          (BIT5 | BIT6)   /**< Partner can 10BASE-T */
 /** @} */
 
+/**
+ * @name    Bits in the MII Auto-Negotiation Expansion Register
+ * @{
+ */
+#define MII_LPA_HAS_AN      BIT0    /**< Partner can auto-negotiate */
+/** @} */
+
 /**
  * @brief   Check if an Ethernet PHY supports 100 Mbps at full duplex
  *