diff --git a/wifi/1.0/IWifiStaIfaceEventCallback.hal b/wifi/1.0/IWifiStaIfaceEventCallback.hal
index 7466fc3..129c258 100644
--- a/wifi/1.0/IWifiStaIfaceEventCallback.hal
+++ b/wifi/1.0/IWifiStaIfaceEventCallback.hal
@@ -27,11 +27,6 @@
   };
 
   /**
-   * BSSID type. 6 octets representing the physical address of an AP.
-   */
-  typedef uint8_t[6] Bssid;
-
-  /**
    * Structure describing all the information about a single access point seen
    * during the scan.
    */
@@ -39,8 +34,8 @@
     int64_t timeStampInUs;
     vec<uint8_t> ssid;
     Bssid bssid;
-    uint32_t frequencyInMhz;
     int8_t rssi;
+    WifiChannelInMhz frequency;
     uint16_t beaconPeriodInMs;
     uint16_t capability;
     vec<InformationElement> informationElements;