diff --git a/core/jetifier.mk b/core/jetifier.mk
new file mode 100644
index 0000000..305c9dd
--- /dev/null
+++ b/core/jetifier.mk
@@ -0,0 +1,34 @@
+#
+# Copyright (C) 2018 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# This file sets up the running of Jetifier
+
+# now add the rule to run jetifier
+ifeq ($(strip $(LOCAL_JETIFIER_ENABLED)),true)
+  my_jetifier_input_path := $(LOCAL_JETIFIER_INPUT_FILE)
+  my_files := $(intermediates.COMMON)/jetifier
+  my_jetifier_output_path := $(my_files)/classes-jetifier.jar
+
+$(my_jetifier_output_path) : $(my_jetifier_input_path) $(JETIFIER)
+	rm -rf $@
+	$(JETIFIER) -outputfile $@ -i $<
+
+  LOCAL_JETIFIER_OUTPUT_FILE := $(my_jetifier_output_path)
+  LOCAL_INTERMEDIATE_TARGETS += $(LOCAL_JETIFIER_OUTPUT_FILE)
+else
+  LOCAL_JETIFIER_OUTPUT_FILE := $(LOCAL_JETIFIER_INPUT_FILE)
+endif
+