diff --git a/core/soong_config.mk b/core/soong_config.mk
index acd213c776..7300e8cf9a 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -174,6 +174,10 @@ $(call add_json_map,  BuildFlags)
 $(foreach flag,$(_ALL_RELEASE_FLAGS),\
   $(call add_json_str,$(flag),$(_ALL_RELEASE_FLAGS.$(flag).VALUE)))
 $(call end_json_map)
+$(call add_json_map,  BuildFlagTypes)
+$(foreach flag,$(_ALL_RELEASE_FLAGS),\
+  $(call add_json_str,$(flag),$(_ALL_RELEASE_FLAGS.$(flag).TYPE)))
+$(call end_json_map)
 
 $(call add_json_bool, DirectedVendorSnapshot,            $(DIRECTED_VENDOR_SNAPSHOT))
 $(call add_json_map,  VendorSnapshotModules)