diff --git a/biometrics/face/aidl/default/Session.cpp b/biometrics/face/aidl/default/Session.cpp
index a7130e6..ce6c557 100644
--- a/biometrics/face/aidl/default/Session.cpp
+++ b/biometrics/face/aidl/default/Session.cpp
@@ -37,7 +37,7 @@
 
 Session::Session(std::shared_ptr<ISessionCallback> cb) : cb_(std::move(cb)) {}
 
-ndk::ScopedAStatus Session::generateChallenge(int32_t /*cookie*/, int32_t /*timeoutSec*/) {
+ndk::ScopedAStatus Session::generateChallenge(int32_t /*cookie*/) {
     LOG(INFO) << "generateChallenge";
     if (cb_) {
         cb_->onStateChanged(0, SessionState::GENERATING_CHALLENGE);
diff --git a/biometrics/face/aidl/default/Session.h b/biometrics/face/aidl/default/Session.h
index 0651726..eb9ae83 100644
--- a/biometrics/face/aidl/default/Session.h
+++ b/biometrics/face/aidl/default/Session.h
@@ -30,7 +30,7 @@
   public:
     explicit Session(std::shared_ptr<ISessionCallback> cb);
 
-    ndk::ScopedAStatus generateChallenge(int32_t cookie, int32_t timeoutSec) override;
+    ndk::ScopedAStatus generateChallenge(int32_t cookie) override;
 
     ndk::ScopedAStatus revokeChallenge(int32_t cookie, int64_t challenge) override;