diff --git a/samples/BasicTutorial8.cs b/samples/BasicTutorial8.cs
index e3ddf9d88b..2b4bde5de9 100644
--- a/samples/BasicTutorial8.cs
+++ b/samples/BasicTutorial8.cs
@@ -125,7 +125,7 @@ namespace GstreamerSharp
 		{
 			b = 1;
 			d = 1;
-			Gst.Audio.AudioInfo info = Gst.Audio.AudioInfo.Zero;
+			Gst.Audio.AudioInfo info = new Gst.Audio.AudioInfo();
 
 			// Initialize Gstreamer
 			Gst.Application.Init(ref args);
diff --git a/samples/PlaybackTutorial3.cs b/samples/PlaybackTutorial3.cs
index bd0027a284..47ecef5893 100644
--- a/samples/PlaybackTutorial3.cs
+++ b/samples/PlaybackTutorial3.cs
@@ -93,7 +93,7 @@ namespace GstreamerSharp
 
 		// This function is called when playbin has created the appsrc element, so we have a chance to configure it.
 		static void SourceSetup (object sender, GLib.SignalArgs args) {
-			var info = Gst.Audio.AudioInfo.Zero;
+			var info = new Gst.Audio.AudioInfo();
 			var source = new Gst.App.AppSrc(((Element)args.Args [0]).Handle);
 			Console.WriteLine ("Source has been created. Configuring.");
 			AppSource = source;
diff --git a/sources/gstreamer-sharp.metadata b/sources/gstreamer-sharp.metadata
index b3e03ab1d0..8755db6a8d 100644
--- a/sources/gstreamer-sharp.metadata
+++ b/sources/gstreamer-sharp.metadata
@@ -38,6 +38,8 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 	<attr path="/api/namespace/boxed[@cname='GstSample']" name="opaque">true</attr>
 	<attr path="/api/namespace/boxed[@cname='GstSample']" name="parent">GstMiniObject</attr>
 
+	<attr path="/api/namespace/boxed[@cname='GstAudioInfo']" name="opaque">true</attr>
+	<attr path="/api/namespace/boxed[@cname='GstVideoInfo']" name="opaque">true</attr>
 	<attr path="/api/namespace/boxed[@cname='GstAtomicQueue']" name="opaque">true</attr>
 	<attr path="/api/namespace/boxed[@cname='GstParseContext']" name="opaque">true</attr>
 	<attr path="/api/namespace/object[@cname='GstElementFactory']" name="opaque">true</attr>