diff --git a/java/gen.go b/java/gen.go
index 7a0dcac..4893e88 100644
--- a/java/gen.go
+++ b/java/gen.go
@@ -107,7 +107,7 @@
 	if len(protoFiles) > 0 {
 		protoSrcJar := android.PathForModuleGen(ctx, "proto.srcjar")
 		genProto(ctx, protoSrcJar, protoFiles,
-			flags.protoFlags, flags.protoOutFlag, "")
+			flags.protoFlags, flags.protoOutTypeFlag, flags.protoOutParams)
 
 		outSrcFiles = append(outSrcFiles, protoSrcJar)
 	}