diff --git a/android/variable.go b/android/variable.go
index a715e0e..c9b29f1 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -508,7 +508,8 @@
 
 	ArtTargetIncludeDebugBuild *bool `json:",omitempty"`
 
-	SystemPropFiles []string `json:",omitempty"`
+	SystemPropFiles    []string `json:",omitempty"`
+	SystemExtPropFiles []string `json:",omitempty"`
 
 	EnableUffdGc *string `json:",omitempty"`
 }