diff --git a/biometrics/face/aidl/aidl_api/android.hardware.biometrics.face/current/android/hardware/biometrics/face/ISessionCallback.aidl b/biometrics/face/aidl/aidl_api/android.hardware.biometrics.face/current/android/hardware/biometrics/face/ISessionCallback.aidl
index d6ebbb6..b0bfa30 100644
--- a/biometrics/face/aidl/aidl_api/android.hardware.biometrics.face/current/android/hardware/biometrics/face/ISessionCallback.aidl
+++ b/biometrics/face/aidl/aidl_api/android.hardware.biometrics.face/current/android/hardware/biometrics/face/ISessionCallback.aidl
@@ -53,4 +53,5 @@
   void onEnrollmentsRemoved(in int[] enrollmentIds);
   void onAuthenticatorIdRetrieved(in long authenticatorId);
   void onAuthenticatorIdInvalidated(in long newAuthenticatorId);
+  void onSessionClosed();
 }
diff --git a/biometrics/face/aidl/android/hardware/biometrics/face/ISessionCallback.aidl b/biometrics/face/aidl/android/hardware/biometrics/face/ISessionCallback.aidl
index 2e3cd95..c1aa3fc 100644
--- a/biometrics/face/aidl/android/hardware/biometrics/face/ISessionCallback.aidl
+++ b/biometrics/face/aidl/android/hardware/biometrics/face/ISessionCallback.aidl
@@ -227,4 +227,10 @@
      *                           current set of enrollments.
      */
     void onAuthenticatorIdInvalidated(in long newAuthenticatorId);
+
+    /**
+     * This method notifes the client that this session has closed.
+     * The client must not make any more calls to this session.
+     */
+    void onSessionClosed();
 }
diff --git a/biometrics/face/aidl/vts/VtsHalBiometricsFaceTargetTest.cpp b/biometrics/face/aidl/vts/VtsHalBiometricsFaceTargetTest.cpp
index 4cc8b4a..936fcc6 100644
--- a/biometrics/face/aidl/vts/VtsHalBiometricsFaceTargetTest.cpp
+++ b/biometrics/face/aidl/vts/VtsHalBiometricsFaceTargetTest.cpp
@@ -120,6 +120,8 @@
         return ndk::ScopedAStatus::ok();
     }
 
+    ndk::ScopedAStatus onSessionClosed() override { return ndk::ScopedAStatus::ok(); }
+
   private:
     std::promise<SessionCallbackInvocation> invocation_promise_;
 };
diff --git a/biometrics/fingerprint/aidl/aidl_api/android.hardware.biometrics.fingerprint/current/android/hardware/biometrics/fingerprint/ISessionCallback.aidl b/biometrics/fingerprint/aidl/aidl_api/android.hardware.biometrics.fingerprint/current/android/hardware/biometrics/fingerprint/ISessionCallback.aidl
index 13c2b05..3a97717 100644
--- a/biometrics/fingerprint/aidl/aidl_api/android.hardware.biometrics.fingerprint/current/android/hardware/biometrics/fingerprint/ISessionCallback.aidl
+++ b/biometrics/fingerprint/aidl/aidl_api/android.hardware.biometrics.fingerprint/current/android/hardware/biometrics/fingerprint/ISessionCallback.aidl
@@ -50,4 +50,5 @@
   void onEnrollmentsRemoved(in int[] enrollmentIds);
   void onAuthenticatorIdRetrieved(in long authenticatorId);
   void onAuthenticatorIdInvalidated(in long newAuthenticatorId);
+  void onSessionClosed();
 }
diff --git a/biometrics/fingerprint/aidl/android/hardware/biometrics/fingerprint/ISessionCallback.aidl b/biometrics/fingerprint/aidl/android/hardware/biometrics/fingerprint/ISessionCallback.aidl
index fde1df7..cf3a271 100644
--- a/biometrics/fingerprint/aidl/android/hardware/biometrics/fingerprint/ISessionCallback.aidl
+++ b/biometrics/fingerprint/aidl/android/hardware/biometrics/fingerprint/ISessionCallback.aidl
@@ -200,4 +200,10 @@
      *                           current set of enrollments.
      */
     void onAuthenticatorIdInvalidated(in long newAuthenticatorId);
+
+    /**
+     * This method notifes the client that this session has closed.
+     * The client must not make any more calls to this session.
+     */
+    void onSessionClosed();
 }
diff --git a/biometrics/fingerprint/aidl/default/Session.cpp b/biometrics/fingerprint/aidl/default/Session.cpp
index c035407..f030f13 100644
--- a/biometrics/fingerprint/aidl/default/Session.cpp
+++ b/biometrics/fingerprint/aidl/default/Session.cpp
@@ -219,11 +219,11 @@
     return ndk::ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Session::close(int32_t cookie) {
+ndk::ScopedAStatus Session::close(int32_t /*cookie*/) {
     LOG(INFO) << "close";
     CHECK(mCurrentState == SessionState::IDLING) << "Can't close a non-idling session. Crashing.";
     mCurrentState = SessionState::CLOSED;
-    mCb->onStateChanged(cookie, mCurrentState);
+    mCb->onSessionClosed();
     return ndk::ScopedAStatus::ok();
 }
 
diff --git a/biometrics/fingerprint/aidl/vts/VtsHalBiometricsFingerprintTargetTest.cpp b/biometrics/fingerprint/aidl/vts/VtsHalBiometricsFingerprintTargetTest.cpp
index 894fdfe..885f703 100644
--- a/biometrics/fingerprint/aidl/vts/VtsHalBiometricsFingerprintTargetTest.cpp
+++ b/biometrics/fingerprint/aidl/vts/VtsHalBiometricsFingerprintTargetTest.cpp
@@ -119,6 +119,8 @@
         return ndk::ScopedAStatus::ok();
     }
 
+    ndk::ScopedAStatus onSessionClosed() override { return ndk::ScopedAStatus::ok(); }
+
   private:
     bool mIsPromiseValid;
     std::vector<Invocation> mInvocations;