diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 36f9dec..0d9f5e3 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -135,6 +135,7 @@
 LOCAL_JAVA_LIBRARIES:=
 LOCAL_JAVA_RESOURCE_DIRS:=
 LOCAL_JAVA_RESOURCE_FILES:=
+LOCAL_JETIFIER_ENABLED:=
 LOCAL_JNI_SHARED_LIBRARIES:=
 LOCAL_JNI_SHARED_LIBRARIES_ABI:=
 LOCAL_LDFLAGS:=
diff --git a/core/config.mk b/core/config.mk
index 546ebb2..33705fa 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -695,6 +695,8 @@
 FINDBUGS_DIR := external/owasp/sanitizer/tools/findbugs/bin
 FINDBUGS := $(FINDBUGS_DIR)/findbugs
 
+JETIFIER := prebuilts/sdk/tools/jetifier/jetifier-standalone/bin/jetifier-standalone
+
 # Tool to merge AndroidManifest.xmls
 ANDROID_MANIFEST_MERGER_CLASSPATH := \
     prebuilts/gradle-plugin/com/android/tools/build/manifest-merger/26.0.0-beta2/manifest-merger-26.0.0-beta2.jar \
diff --git a/core/host_java_library.mk b/core/host_java_library.mk
index f34f2f1..a6337eb 100644
--- a/core/host_java_library.mk
+++ b/core/host_java_library.mk
@@ -102,10 +102,16 @@
 	$(MERGE_ZIPS) -j $(if $(PRIVATE_JAR_MANIFEST),-m $(dir $@)/manifest.mf) \
             -stripDir META-INF -zipToNotStrip $< $@ $< $(call reverse-list,$(PRIVATE_STATIC_JAVA_LIBRARIES))
 
+#######################################
+LOCAL_JETIFIER_INPUT_FILE := $(full_classes_combined_jar)
+
+include $(BUILD_SYSTEM)/jetifier.mk
+#######################################
+
 # Run jarjar if necessary, otherwise just copy the file.
 ifneq ($(strip $(LOCAL_JARJAR_RULES)),)
 $(full_classes_jarjar_jar): PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
-$(full_classes_jarjar_jar): $(full_classes_combined_jar) $(LOCAL_JARJAR_RULES) | $(JARJAR)
+$(full_classes_jarjar_jar): $(LOCAL_JETIFIER_OUTPUT_FILE) $(LOCAL_JARJAR_RULES) | $(JARJAR)
 	@echo JarJar: $@
 	$(hide) $(JAVA) -jar $(JARJAR) process $(PRIVATE_JARJAR_RULES) $< $@
 else
@@ -113,9 +119,9 @@
 endif
 
 
+#######################################
 LOCAL_FULL_CLASSES_PRE_JACOCO_JAR := $(full_classes_jarjar_jar)
 
-#######################################
 include $(BUILD_SYSTEM)/jacoco.mk
 #######################################
 
diff --git a/core/java.mk b/core/java.mk
index 2f0e3c3..67ed9d1 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -557,11 +557,17 @@
 full_classes_jarjar_jar := $(full_classes_processed_jar)
 endif
 
-$(eval $(call copy-one-file,$(full_classes_jarjar_jar),$(full_classes_jar)))
+#######################################
+LOCAL_JETIFIER_INPUT_FILE := $(full_classes_jarjar_jar)
 
-LOCAL_FULL_CLASSES_PRE_JACOCO_JAR := $(full_classes_jar)
+include $(BUILD_SYSTEM)/jetifier.mk
+#######################################
+
+$(eval $(call copy-one-file,$(LOCAL_JETIFIER_OUTPUT_FILE),$(full_classes_jar)))
 
 #######################################
+LOCAL_FULL_CLASSES_PRE_JACOCO_JAR := $(full_classes_jar)
+
 include $(BUILD_SYSTEM)/jacoco.mk
 #######################################
 
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
+