diff --git a/libs/vibrator/ExternalVibration.cpp b/libs/vibrator/ExternalVibration.cpp
index ec90645..80e911c 100644
--- a/libs/vibrator/ExternalVibration.cpp
+++ b/libs/vibrator/ExternalVibration.cpp
@@ -22,15 +22,6 @@
 #include <log/log.h>
 #include <utils/Errors.h>
 
-
-// To guarantee if HapticScale enum has the same value as IExternalVibratorService
-static_assert(static_cast<int>(android::os::HapticScale::MUTE) == static_cast<int>(android::os::IExternalVibratorService::SCALE_MUTE));
-static_assert(static_cast<int>(android::os::HapticScale::VERY_LOW) == static_cast<int>(android::os::IExternalVibratorService::SCALE_VERY_LOW));
-static_assert(static_cast<int>(android::os::HapticScale::LOW) == static_cast<int>(android::os::IExternalVibratorService::SCALE_LOW));
-static_assert(static_cast<int>(android::os::HapticScale::NONE) == static_cast<int>(android::os::IExternalVibratorService::SCALE_NONE));
-static_assert(static_cast<int>(android::os::HapticScale::HIGH) == static_cast<int>(android::os::IExternalVibratorService::SCALE_HIGH));
-static_assert(static_cast<int>(android::os::HapticScale::VERY_HIGH) == static_cast<int>(android::os::IExternalVibratorService::SCALE_VERY_HIGH));
-
 void writeAudioAttributes(const audio_attributes_t& attrs, android::Parcel* out) {
     out->writeInt32(attrs.usage);
     out->writeInt32(attrs.content_type);
@@ -74,5 +65,25 @@
     return mToken == rhs.mToken;
 }
 
+os::HapticScale ExternalVibration::externalVibrationScaleToHapticScale(int externalVibrationScale) {
+    switch (externalVibrationScale) {
+        case IExternalVibratorService::SCALE_MUTE:
+            return os::HapticScale::MUTE;
+        case IExternalVibratorService::SCALE_VERY_LOW:
+            return os::HapticScale::VERY_LOW;
+        case IExternalVibratorService::SCALE_LOW:
+            return os::HapticScale::LOW;
+        case IExternalVibratorService::SCALE_NONE:
+            return os::HapticScale::NONE;
+        case IExternalVibratorService::SCALE_HIGH:
+            return os::HapticScale::HIGH;
+        case IExternalVibratorService::SCALE_VERY_HIGH:
+            return os::HapticScale::VERY_HIGH;
+        default:
+          ALOGE("Unknown ExternalVibrationScale %d, not applying scaling", externalVibrationScale);
+          return os::HapticScale::NONE;
+      }
+}
+
 } // namespace os
 } // namespace android
diff --git a/libs/vibrator/include/vibrator/ExternalVibration.h b/libs/vibrator/include/vibrator/ExternalVibration.h
index 760dbce..00cd3cd 100644
--- a/libs/vibrator/include/vibrator/ExternalVibration.h
+++ b/libs/vibrator/include/vibrator/ExternalVibration.h
@@ -23,6 +23,7 @@
 #include <binder/Parcelable.h>
 #include <system/audio.h>
 #include <utils/RefBase.h>
+#include <vibrator/ExternalVibrationUtils.h>
 
 namespace android {
 namespace os {
@@ -44,6 +45,10 @@
     audio_attributes_t getAudioAttributes() const { return mAttrs; }
     sp<IExternalVibrationController> getController() { return mController; }
 
+    /* Converts the scale from non-public ExternalVibrationService into the HapticScale
+     * used by the utils.
+     */
+    static os::HapticScale externalVibrationScaleToHapticScale(int externalVibrationScale);
 
 private:
     int32_t mUid;
@@ -53,7 +58,7 @@
     sp<IBinder> mToken = new BBinder();
 };
 
-} // namespace android
 } // namespace os
+} // namespace android
 
 #endif // ANDROID_EXTERNAL_VIBRATION_H
diff --git a/libs/vibrator/include/vibrator/ExternalVibrationUtils.h b/libs/vibrator/include/vibrator/ExternalVibrationUtils.h
index c588bfd..ca219d3 100644
--- a/libs/vibrator/include/vibrator/ExternalVibrationUtils.h
+++ b/libs/vibrator/include/vibrator/ExternalVibrationUtils.h
@@ -19,8 +19,6 @@
 
 namespace android::os {
 
-// Copied from frameworks/base/core/java/android/os/IExternalVibratorService.aidl
-// The values are checked in ExternalVibration.cpp
 enum class HapticScale {
     MUTE = -100,
     VERY_LOW = -2,