diff --git a/core/configure_local_jack.mk b/core/configure_local_jack.mk
index 159fac4..4bd7a5e 100644
--- a/core/configure_local_jack.mk
+++ b/core/configure_local_jack.mk
@@ -17,6 +17,11 @@
 LOCAL_JACK_ENABLED := $(strip $(LOCAL_JACK_ENABLED))
 ifneq ($(LOCAL_JACK_ENABLED),full)
 ifneq ($(LOCAL_JACK_ENABLED),incremental)
+ifdef LOCAL_JACK_ENABLED
+ifneq ($(LOCAL_JACK_ENABLED),disabled)
+$(error $(LOCAL_PATH): invalid LOCAL_JACK_ENABLED "$(LOCAL_JACK_ENABLED)" for $(LOCAL_MODULE))
+endif
+endif
 LOCAL_JACK_ENABLED :=
 endif
 endif