diff --git a/wifi/1.5/default/wifi.cpp b/wifi/1.5/default/wifi.cpp
index da98db8..b4037e9 100644
--- a/wifi/1.5/default/wifi.cpp
+++ b/wifi/1.5/default/wifi.cpp
@@ -50,13 +50,21 @@
 }
 
 Return<void> Wifi::registerEventCallback(
-    const sp<IWifiEventCallback>& event_callback,
+    const sp<V1_0::IWifiEventCallback>& event_callback,
     registerEventCallback_cb hidl_status_cb) {
     return validateAndCall(this, WifiStatusCode::ERROR_UNKNOWN,
                            &Wifi::registerEventCallbackInternal, hidl_status_cb,
                            event_callback);
 }
 
+Return<void> Wifi::registerEventCallback_1_5(
+    const sp<V1_5::IWifiEventCallback>& event_callback,
+    registerEventCallback_1_5_cb hidl_status_cb) {
+    return validateAndCall(this, WifiStatusCode::ERROR_UNKNOWN,
+                           &Wifi::registerEventCallbackInternal_1_5,
+                           hidl_status_cb, event_callback);
+}
+
 Return<bool> Wifi::isStarted() { return run_state_ != RunState::STOPPED; }
 
 Return<void> Wifi::start(start_cb hidl_status_cb) {
@@ -95,7 +103,13 @@
 }
 
 WifiStatus Wifi::registerEventCallbackInternal(
-    const sp<IWifiEventCallback>& event_callback) {
+    const sp<V1_0::IWifiEventCallback>& event_callback __unused) {
+    // Deprecated support for this callback.
+    return createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED);
+}
+
+WifiStatus Wifi::registerEventCallbackInternal_1_5(
+    const sp<V1_5::IWifiEventCallback>& event_callback) {
     if (!event_cb_handler_.addCallback(event_callback)) {
         return createWifiStatus(WifiStatusCode::ERROR_UNKNOWN);
     }