diff --git a/Android.bp b/Android.bp
index 819732d..4ff1558 100644
--- a/Android.bp
+++ b/Android.bp
@@ -111,4 +111,9 @@
 cc_library {
     name: "libhidltransport",
     vendor_available: true,
+
+    visibility: [
+        "//device:__subpackages__",
+        "//vendor:__subpackages__",
+    ],
 }
diff --git a/transport/include/hidl/HidlBinderSupport.h b/transport/include/hidl/HidlBinderSupport.h
index 5dec5cd..05f7fab 100644
--- a/transport/include/hidl/HidlBinderSupport.h
+++ b/transport/include/hidl/HidlBinderSupport.h
@@ -204,10 +204,17 @@
     if (binderIface.get() == nullptr) {
         return nullptr;
     }
+
     if (binderIface->localBinder() == nullptr) {
         return new ProxyType(binderIface);
     }
+
+    // Ensure that IBinder is BnHwBase (not JHwBinder, for instance)
+    if (!binderIface->checkSubclass(IBase::descriptor)) {
+        return new ProxyType(binderIface);
+    }
     sp<IBase> base = static_cast<BnHwBase*>(binderIface.get())->getImpl();
+
     if (details::canCastInterface(base.get(), IType::descriptor)) {
         StubType* stub = static_cast<StubType*>(binderIface.get());
         return stub->getImpl();
diff --git a/transport/include/hidl/HidlLazyUtils.h b/transport/include/hidl/HidlLazyUtils.h
index 257de98..6a62c97 100644
--- a/transport/include/hidl/HidlLazyUtils.h
+++ b/transport/include/hidl/HidlLazyUtils.h
@@ -29,13 +29,13 @@
 /** Exits when all HALs registered through this object have 0 clients */
 class LazyServiceRegistrar {
    public:
-     LazyServiceRegistrar();
      static LazyServiceRegistrar& getInstance();
      status_t registerService(const sp<::android::hidl::base::V1_0::IBase>& service,
                               const std::string& name = "default");
 
    private:
      std::shared_ptr<details::LazyServiceRegistrarImpl> mImpl;
+     LazyServiceRegistrar();
 };
 
 }  // namespace hardware