diff --git a/vibrator/1.0/default/Vibrator.cpp b/vibrator/1.0/default/Vibrator.cpp
index 8c82bcd..19cf3dc 100644
--- a/vibrator/1.0/default/Vibrator.cpp
+++ b/vibrator/1.0/default/Vibrator.cpp
@@ -16,6 +16,8 @@
 
 #define LOG_TAG "VibratorService"
 
+#include <inttypes.h>
+
 #include <log/log.h>
 
 #include <hardware/hardware.h>
@@ -36,7 +38,7 @@
     int32_t ret = mDevice->vibrator_on(mDevice, timeout_ms);
     if (ret != 0) {
         ALOGE("on command failed : %s", strerror(-ret));
-        return Status::ERR;
+        return Status::UNKNOWN_ERROR;
     }
     return Status::OK;
 }
@@ -45,11 +47,24 @@
     int32_t ret = mDevice->vibrator_off(mDevice);
     if (ret != 0) {
         ALOGE("off command failed : %s", strerror(-ret));
-        return Status::ERR;
+        return Status::UNKNOWN_ERROR;
     }
     return Status::OK;
 }
 
+Return<bool> Vibrator::supportsAmplitudeControl()  {
+    return false;
+}
+
+Return<Status> Vibrator::setAmplitude(uint8_t) {
+    return Status::UNSUPPORTED_OPERATION;
+}
+
+Return<void> Vibrator::perform(Effect, EffectStrength, perform_cb _hidl_cb) {
+    _hidl_cb(Status::UNSUPPORTED_OPERATION, 0);
+    return Void();
+}
+
 IVibrator* HIDL_FETCH_IVibrator(const char * /*hal*/) {
     vibrator_device_t *vib_device;
     const hw_module_t *hw_module = nullptr;
diff --git a/vibrator/1.0/default/Vibrator.h b/vibrator/1.0/default/Vibrator.h
index 061b364..bea6ea8 100644
--- a/vibrator/1.0/default/Vibrator.h
+++ b/vibrator/1.0/default/Vibrator.h
@@ -26,23 +26,18 @@
 namespace V1_0 {
 namespace implementation {
 
-using ::android::hardware::vibrator::V1_0::IVibrator;
-using ::android::hardware::vibrator::V1_0::Status;
-using ::android::hardware::Return;
-using ::android::hardware::Void;
-using ::android::hardware::hidl_vec;
-using ::android::hardware::hidl_string;
-using ::android::sp;
-
 struct Vibrator : public IVibrator {
   Vibrator(vibrator_device_t *device);
 
   // Methods from ::android::hardware::vibrator::V1_0::IVibrator follow.
   Return<Status> on(uint32_t timeoutMs)  override;
   Return<Status> off()  override;
+  Return<bool> supportsAmplitudeControl() override;
+  Return<Status> setAmplitude(uint8_t amplitude) override;
+  Return<void> perform(Effect effect, EffectStrength strength, perform_cb _hidl_cb) override;
 
-  private:
-    vibrator_device_t    *mDevice;
+private:
+  vibrator_device_t    *mDevice;
 };
 
 extern "C" IVibrator* HIDL_FETCH_IVibrator(const char* name);