diff --git a/modules/sensors/Android.mk b/modules/sensors/Android.mk
index ca277e6..5ef6a97 100644
--- a/modules/sensors/Android.mk
+++ b/modules/sensors/Android.mk
@@ -25,7 +25,7 @@
 LOCAL_MODULE_RELATIVE_PATH := hw
 LOCAL_PROPRIETARY_MODULE := true
 
-LOCAL_CFLAGS := -DLOG_TAG=\"MultiHal\"
+LOCAL_CFLAGS := -Wall -Werror -DLOG_TAG=\"MultiHal\"
 
 LOCAL_SRC_FILES := \
     multihal.cpp \
diff --git a/modules/sensors/tests/Android.mk b/modules/sensors/tests/Android.mk
index 010bb90..dcf4f24 100644
--- a/modules/sensors/tests/Android.mk
+++ b/modules/sensors/tests/Android.mk
@@ -5,7 +5,7 @@
 LOCAL_SRC_FILES := \
 	SensorEventQueue_test.cpp
 
-#LOCAL_CFLAGS := -g
+LOCAL_CFLAGS := -Wall -Werror
 LOCAL_MODULE := sensorstests
 
 LOCAL_STATIC_LIBRARIES := libcutils libutils