diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 1fe5455..bac0829 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -113,6 +113,7 @@
 LOCAL_JACK_VM_ARGS := $(DEFAULT_JACK_VM_ARGS)
 LOCAL_JACK_EXTRA_ARGS := $(DEFAULT_JACK_EXTRA_ARGS)
 LOCAL_JACK_FLAGS:=
+LOCAL_JILL_FLAGS:=
 LOCAL_CERTIFICATE:=
 LOCAL_SDK_VERSION:=
 LOCAL_SDK_RES_VERSION:=
diff --git a/core/definitions.mk b/core/definitions.mk
index 4a504bd..024c79d 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1789,7 +1789,7 @@
 
 define transform-jar-to-jack
 	$(hide) mkdir -p $(dir $@)
-	$(JILL) --output $@.tmpjill.jack $<
+	$(JILL) $(PRIVATE_JILL_FLAGS) --output $@.tmpjill.jack $<
 	$(hide) mkdir -p $@.tmpjill.res
 	$(hide) $(call unzip-jar-files,$<,$@.tmpjill.res)
 	$(hide) find $@.tmpjill.res -iname "*.class" -delete
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index e8af1d9..59e3816 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -301,6 +301,7 @@
 endif # TARGET JAVA_LIBRARIES
 
 ifeq ($(LOCAL_MODULE_CLASS),JAVA_LIBRARIES)
+$(intermediates.COMMON)/classes.jack : PRIVATE_JILL_FLAGS:=$(LOCAL_JILL_FLAGS)
 $(intermediates.COMMON)/classes.jack : $(my_prebuilt_src_file) $(LOCAL_MODULE_MAKEFILE) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JILL_JAR) $(JACK_JAR)
 	$(transform-jar-to-jack)