diff --git a/healthd/BatteryPropertiesRegistrar.cpp b/healthd/BatteryPropertiesRegistrar.cpp
index 5d1fa52..d28ba41 100644
--- a/healthd/BatteryPropertiesRegistrar.cpp
+++ b/healthd/BatteryPropertiesRegistrar.cpp
@@ -35,7 +35,7 @@
     defaultServiceManager()->addService(String16("batteryproperties"), service);
 }
 
-void BatteryPropertiesRegistrar::notifyListeners(struct BatteryProperties props) {
+void BatteryPropertiesRegistrar::notifyListeners(const struct BatteryProperties& props) {
     Mutex::Autolock _l(mRegistrationLock);
     for (size_t i = 0; i < mListeners.size(); i++) {
         mListeners[i]->batteryPropertiesChanged(props);
diff --git a/healthd/BatteryPropertiesRegistrar.h b/healthd/BatteryPropertiesRegistrar.h
index d17e4a3..095f3d3 100644
--- a/healthd/BatteryPropertiesRegistrar.h
+++ b/healthd/BatteryPropertiesRegistrar.h
@@ -31,7 +31,7 @@
                                    public IBinder::DeathRecipient {
 public:
     void publish(const sp<BatteryPropertiesRegistrar>& service);
-    void notifyListeners(struct BatteryProperties props);
+    void notifyListeners(const struct BatteryProperties& props);
 
 private:
     Mutex mRegistrationLock;