diff --git a/services/batteryservice/Android.mk b/services/batteryservice/Android.mk
index 9354b99..e4097d7 100644
--- a/services/batteryservice/Android.mk
+++ b/services/batteryservice/Android.mk
@@ -2,17 +2,19 @@
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:= \
-	BatteryProperties.cpp \
-	BatteryProperty.cpp \
-	IBatteryPropertiesListener.cpp \
-	IBatteryPropertiesRegistrar.cpp
+    BatteryProperties.cpp \
+    BatteryProperty.cpp \
+    IBatteryPropertiesListener.cpp \
+    IBatteryPropertiesRegistrar.cpp
 
 LOCAL_STATIC_LIBRARIES := \
-	libutils \
-	libbinder
+    libutils \
+    libbinder
 
 LOCAL_MODULE:= libbatteryservice
 
 LOCAL_MODULE_TAGS := optional
 
+LOCAL_CFLAGS += -Wall -Werror -Wunused -Wunreachable-code
+
 include $(BUILD_STATIC_LIBRARY)
diff --git a/services/batteryservice/IBatteryPropertiesListener.cpp b/services/batteryservice/IBatteryPropertiesListener.cpp
index 19ac7f0..8aff26c 100644
--- a/services/batteryservice/IBatteryPropertiesListener.cpp
+++ b/services/batteryservice/IBatteryPropertiesListener.cpp
@@ -35,7 +35,7 @@
         data.writeInterfaceToken(IBatteryPropertiesListener::getInterfaceDescriptor());
         data.writeInt32(1);
         props.writeToParcel(&data);
-        status_t err = remote()->transact(TRANSACT_BATTERYPROPERTIESCHANGED, data, &reply, IBinder::FLAG_ONEWAY);
+        remote()->transact(TRANSACT_BATTERYPROPERTIESCHANGED, data, &reply, IBinder::FLAG_ONEWAY);
     }
 };
 
diff --git a/services/powermanager/Android.mk b/services/powermanager/Android.mk
index d98b2da..7b24c65 100644
--- a/services/powermanager/Android.mk
+++ b/services/powermanager/Android.mk
@@ -2,14 +2,16 @@
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:= \
-	IPowerManager.cpp
+    IPowerManager.cpp
 
 LOCAL_SHARED_LIBRARIES := \
-	libutils \
-	libbinder
+    libutils \
+    libbinder
 
 LOCAL_MODULE:= libpowermanager
 
 LOCAL_MODULE_TAGS := optional
 
+LOCAL_CFLAGS += -Wall -Werror -Wunused -Wunreachable-code
+
 include $(BUILD_SHARED_LIBRARY)