diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 09f9be5..06518ee 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -78,6 +78,7 @@
 LOCAL_EXPORT_C_INCLUDE_DIRS:=
 LOCAL_EXPORT_HEADER_LIBRARY_HEADERS:=
 LOCAL_EXPORT_PACKAGE_RESOURCES:=
+LOCAL_EXPORT_PROGUARD_FLAG_FILES:=
 LOCAL_EXPORT_SHARED_LIBRARY_HEADERS:=
 LOCAL_EXPORT_STATIC_LIBRARY_HEADERS:=
 LOCAL_EXTRACT_APK:=
diff --git a/core/java.mk b/core/java.mk
index 3e0123b..cfe2539 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -644,6 +644,12 @@
 common_proguard_flags += -dontshrink # don't shrink tests by default
 endif # shrinktests
 endif # test package
+ifneq ($(LOCAL_PROGUARD_ENABLED),custom)
+  ifdef LOCAL_USE_AAPT2
+    common_proguard_flag_files += $(foreach l,$(LOCAL_STATIC_ANDROID_LIBRARIES),\
+        $(call intermediates-dir-for,JAVA_LIBRARIES,$(l),,COMMON)/export_proguard_flags)
+  endif
+endif
 ifneq ($(common_proguard_flag_files),)
 common_proguard_flags += $(addprefix -include , $(common_proguard_flag_files))
 # This is included from $(BUILD_SYSTEM)/proguard.flags
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index 69df2d1..2a9ad1f 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -566,12 +566,16 @@
 ifneq ($(my_src_aar),)
 # This is .aar file, archive of classes.jar and Android resources.
 my_src_jar := $(intermediates.COMMON)/aar/classes.jar
+my_src_proguard_options := $(intermediates.COMMON)/aar/proguard.txt
 
+$(my_src_jar) : .KATI_IMPLICIT_OUTPUTS := $(my_src_proguard_options)
 $(my_src_jar) : $(my_src_aar)
 	$(hide) rm -rf $(dir $@) && mkdir -p $(dir $@) $(dir $@)/res
 	$(hide) unzip -qo -d $(dir $@) $<
 	# Make sure the extracted classes.jar has a new timestamp.
 	$(hide) touch $@
+	# Make sure the proguard file exists and has a new timestamp.
+	$(hide) touch $(dir $@)/proguard.txt
 
 endif
 
@@ -595,6 +599,10 @@
 
 ifdef LOCAL_USE_AAPT2
 ifneq ($(my_src_aar),)
+
+$(intermediates.COMMON)/export_proguard_flags : $(my_src_proguard_options)
+	$(transform-prebuilt-to-target)
+
 LOCAL_SDK_RES_VERSION:=$(strip $(LOCAL_SDK_RES_VERSION))
 ifeq ($(LOCAL_SDK_RES_VERSION),)
   LOCAL_SDK_RES_VERSION:=$(LOCAL_SDK_VERSION)
diff --git a/core/static_java_library.mk b/core/static_java_library.mk
index 6645af5..8348349 100644
--- a/core/static_java_library.mk
+++ b/core/static_java_library.mk
@@ -118,6 +118,13 @@
 endif
 endif
 
+ifdef LOCAL_USE_AAPT2
+$(intermediates.COMMON)/export_proguard_flags: $(addprefix $(LOCAL_PATH)/,$(LOCAL_EXPORT_PROGUARD_FLAG_FILES))
+	@echo "Export proguard flags: $@"
+	rm -f $@
+	cat $+ >$@
+endif
+
 # add --non-constant-id to prevent inlining constants.
 # AAR needs text symbol file R.txt.
 ifdef LOCAL_USE_AAPT2