diff --git a/cc/cc.go b/cc/cc.go
index ebc98acfd..4d26e84de 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -1423,6 +1423,7 @@ func DefaultsFactory(props ...interface{}) android.Module {
 		&VndkProperties{},
 		&LTOProperties{},
 		&PgoProperties{},
+		&android.ProtoProperties{},
 	)
 
 	android.InitDefaultsModule(module)
diff --git a/java/java.go b/java/java.go
index ae48bd658..b04f5be01 100644
--- a/java/java.go
+++ b/java/java.go
@@ -1277,6 +1277,7 @@ func DefaultsFactory(props ...interface{}) android.Module {
 	module.AddProperties(
 		&CompilerProperties{},
 		&CompilerDeviceProperties{},
+		&android.ProtoProperties{},
 	)
 
 	android.InitDefaultsModule(module)