diff --git a/lib/libvlc.js b/lib/libvlc.js
index 4ea029b..5ce399c 100644
--- a/lib/libvlc.js
+++ b/lib/libvlc.js
@@ -61,8 +61,8 @@ exports.initialize = function(paths) {
     libvlc_get_compiler: ['string', []],
     libvlc_get_changeset: ['string', []],
     libvlc_free: ['void', ['pointer']],
-    libvlc_event_attach: ['int32', ['pointer', 'int32', 'pointer', ref.types.Object]],
-    libvlc_event_detach: ['void', ['pointer', 'int32', 'pointer', ref.types.Object]],
+    libvlc_event_attach: ['int32', ['pointer', 'int32', 'pointer', 'pointer']],
+    libvlc_event_detach: ['void', ['pointer', 'int32', 'pointer', 'pointer']],
     libvlc_event_type_name: ['string', ['int32']],
     libvlc_module_description_list_release: ['void', [ModuleDescriptionPtr]],
     libvlc_audio_filter_list_get: [ModuleDescriptionPtr, ['pointer']],