diff --git a/native/jni/HostUnitTests.mk b/native/jni/HostUnitTests.mk
index 6dd615c..baf1cac 100644
--- a/native/jni/HostUnitTests.mk
+++ b/native/jni/HostUnitTests.mk
@@ -29,7 +29,7 @@
 #################### Host library for unit test
 LATIN_IME_SRC_DIR := src
 LOCAL_ADDRESS_SANITIZER := true
-LOCAL_CFLAGS += -Wno-unused-parameter -Wno-unused-function
+LOCAL_CFLAGS += -Wno-unused-parameter -Wno-unused-function -Wall -Werror
 LOCAL_CXX_STL := libc++
 LOCAL_C_INCLUDES += $(LOCAL_PATH)/$(LATIN_IME_SRC_DIR)
 LOCAL_MODULE := liblatinime_host_static_for_unittests