diff --git a/biometrics/fingerprint/aidl/default/Session.cpp b/biometrics/fingerprint/aidl/default/Session.cpp
index 96f1e56..bf08203 100644
--- a/biometrics/fingerprint/aidl/default/Session.cpp
+++ b/biometrics/fingerprint/aidl/default/Session.cpp
@@ -79,8 +79,7 @@
     return ndk::ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Session::invalidateAuthenticatorId(int32_t /*cookie*/,
-                                                      const keymaster::HardwareAuthToken& /*hat*/) {
+ndk::ScopedAStatus Session::invalidateAuthenticatorId(int32_t /*cookie*/) {
     return ndk::ScopedAStatus::ok();
 }
 
diff --git a/biometrics/fingerprint/aidl/default/Session.h b/biometrics/fingerprint/aidl/default/Session.h
index 05c570c..ed3ae3f 100644
--- a/biometrics/fingerprint/aidl/default/Session.h
+++ b/biometrics/fingerprint/aidl/default/Session.h
@@ -49,8 +49,7 @@
 
     ndk::ScopedAStatus getAuthenticatorId(int32_t cookie) override;
 
-    ndk::ScopedAStatus invalidateAuthenticatorId(int32_t cookie,
-                                                 const keymaster::HardwareAuthToken& hat) override;
+    ndk::ScopedAStatus invalidateAuthenticatorId(int32_t cookie) override;
 
     ndk::ScopedAStatus resetLockout(int32_t cookie,
                                     const keymaster::HardwareAuthToken& hat) override;