diff --git a/power/aidl/default/PowerHintSession.cpp b/power/aidl/default/PowerHintSession.cpp
index aa95be4..f395800 100644
--- a/power/aidl/default/PowerHintSession.cpp
+++ b/power/aidl/default/PowerHintSession.cpp
@@ -51,4 +51,12 @@
     return ScopedAStatus::ok();
 }
 
+ScopedAStatus PowerHintSession::setThreads(const std::vector<int32_t>& threadIds) {
+    if (threadIds.size() == 0) {
+        LOG(ERROR) << "Error: threadIds.size() shouldn't be " << threadIds.size();
+        return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+    }
+    return ScopedAStatus::ok();
+}
+
 }  // namespace aidl::android::hardware::power::impl::example