diff --git a/inc/saiswitch.h b/inc/saiswitch.h
index c7d521288..c5183d6a1 100644
--- a/inc/saiswitch.h
+++ b/inc/saiswitch.h
@@ -261,6 +261,19 @@ typedef enum _sai_switch_hardware_access_bus_t
 
 } sai_switch_hardware_access_bus_t;
 
+/**
+ * @brief Attribute data for #SAI_SWITCH_ATTR_MDIO_ACCESS_TYPE
+ */
+typedef enum _sai_switch_mdio_clause_t
+{
+    /** MDIO Clause 22 */
+    SAI_SWITCH_MDIO_CLAUSE_22,
+
+    /** MDIO Clause 45 */
+    SAI_SWITCH_MDIO_CLAUSE_45,
+
+} sai_switch_mdio_clause_t;
+
 /**
  * @brief Attribute data for #SAI_SWITCH_ATTR_FIRMWARE_LOAD_METHOD
  */
@@ -2776,6 +2789,17 @@ typedef enum _sai_switch_attr_t
      */
     SAI_SWITCH_ATTR_ECMP_MEMBER_COUNT,
 
+    /**
+     * @brief Switch MDIO access type
+     *
+     * set mdio access type (clause 22 or clause 45) before calling sai_switch_mdio_read_fn and sai_switch_mdio_write_fn
+     *
+     * @type sai_switch_mdio_clause_t
+     * @flags CREATE_AND_SET
+     * @default SAI_SWITCH_MDIO_CLAUSE_45
+     */
+    SAI_SWITCH_ATTR_MDIO_ACCESS_TYPE,
+
     /**
      * @brief End of attributes
      */