diff --git a/rust/project_json.go b/rust/project_json.go
index fe259d6..40aa7c7 100644
--- a/rust/project_json.go
+++ b/rust/project_json.go
@@ -74,7 +74,7 @@
 }
 
 func init() {
-	android.RegisterSingletonType("rust_project_generator", rustProjectGeneratorSingleton)
+	android.RegisterParallelSingletonType("rust_project_generator", rustProjectGeneratorSingleton)
 }
 
 // sourceProviderVariantSource returns the path to the source file if this