diff --git a/android/variable.go b/android/variable.go
index 419bd61..a3fdafb 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -492,6 +492,8 @@
 
 	BuildFlags map[string]string `json:",omitempty"`
 
+	BuildFlagTypes map[string]string `json:",omitempty"`
+
 	BuildFromSourceStub *bool `json:",omitempty"`
 
 	BuildIgnoreApexContributionContents *bool `json:",omitempty"`