diff --git a/wifi/supplicant/aidl/aidl_api/android.hardware.wifi.supplicant/current/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl b/wifi/supplicant/aidl/aidl_api/android.hardware.wifi.supplicant/current/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
index 45563b3..0a2d428 100644
--- a/wifi/supplicant/aidl/aidl_api/android.hardware.wifi.supplicant/current/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
+++ b/wifi/supplicant/aidl/aidl_api/android.hardware.wifi.supplicant/current/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
@@ -70,6 +70,7 @@
   oneway void onMloLinksInfoChanged(in android.hardware.wifi.supplicant.ISupplicantStaIfaceCallback.MloLinkInfoChangeReason reason);
   oneway void onDppConfigReceived(in android.hardware.wifi.supplicant.DppConfigurationData configData);
   oneway void onDppConnectionStatusResultSent(in android.hardware.wifi.supplicant.DppStatusErrorCode code);
+  oneway void onBssFrequencyChanged(in int frequencyMhz);
   @Backing(type="int") @VintfStability
   enum MloLinkInfoChangeReason {
     TID_TO_LINK_MAP = 0,
diff --git a/wifi/supplicant/aidl/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl b/wifi/supplicant/aidl/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
index 29bb0f9..7d46649 100644
--- a/wifi/supplicant/aidl/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
+++ b/wifi/supplicant/aidl/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
@@ -384,4 +384,13 @@
      * Indicates that DPP connection status result frame is sent.
      */
     void onDppConnectionStatusResultSent(in DppStatusErrorCode code);
+
+    /**
+     * Used to indicate that the operating frequency has changed for this BSS.
+     * This event is triggered when STA switches the channel due to channel
+     * switch announcement from the connected access point.
+     *
+     * @param frequencyMhz New operating frequency in MHz.
+     */
+    void onBssFrequencyChanged(in int frequencyMhz);
 }
diff --git a/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp b/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp
index cb2881b..e957834 100644
--- a/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp
+++ b/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp
@@ -227,6 +227,9 @@
             ::aidl::android::hardware::wifi::supplicant::DppStatusErrorCode /* code */) override {
         return ndk::ScopedAStatus::ok();
     }
+    ::ndk::ScopedAStatus onBssFrequencyChanged(int32_t /* frequencyMhz */) override {
+        return ndk::ScopedAStatus::ok();
+    }
 };
 
 class SupplicantStaIfaceAidlTest : public testing::TestWithParam<std::string> {