diff --git a/sources/gstreamer-sharp.metadata b/sources/gstreamer-sharp.metadata
index cb5c1dabbc..2943f2e14a 100644
--- a/sources/gstreamer-sharp.metadata
+++ b/sources/gstreamer-sharp.metadata
@@ -30,8 +30,23 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 	<attr path="/api/namespace/struct[@cname='GstMiniObject']/field[@cname='free']" name="type">gpointer</attr>
 	<attr path="/api/namespace/struct[@cname='GstMiniObject']/field[@cname='dispose']" name="type">gpointer</attr>
 	<attr path="/api/namespace/struct[@cname='GstMessage']/field[@cname='cond']" name="type">GCond*</attr>
-	<!-- structs that should be opaque -->
+	<!-- structs and objects that should be opaque -->
 	<attr path="/api/namespace/boxed[@cname='GstDateTime']" name="opaque">true</attr>
+	<attr path="/api/namespace/boxed[@cname='GstBufferList']" name="opaque">true</attr>
+	<attr path="/api/namespace/boxed[@cname='GstSample']" 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/interface[@cname='GstTagSetter']" name="opaque">true</attr>
+	<attr path="/api/namespace/interface[@cname='GstTocSetter']" name="opaque">true</attr>
+	<attr path="/api/namespace/interface[@cname='GstChildProxy']" name="opaque">true</attr>
+	<attr path="/api/namespace/interface[@cname='GstPreset']" name="opaque">true</attr>
+	<attr path="/api/namespace/interface[@cname='GstURIHandler']" name="opaque">true</attr>
+	<attr path="/api/namespace/object[@cname='GstElementFactory']" name="opaque">true</attr>
+	<attr path="/api/namespace/object[@cname='GstTypeFindFactory']" name="opaque">true</attr>
+	<attr path="/api/namespace/object[@cname='GstPluginFeature']" name="opaque">true</attr>
+	<attr path="/api/namespace/object[@cname='GstPlugin']" name="opaque">true</attr>
+	<attr path="/api/namespace/object[@cname='GstBus']" name="opaque">true</attr>
+	<attr path="/api/namespace/object[@cname='GstRegistry']" name="opaque">true</attr>
 	<!-- add native attribute to all structs which need special handling -->
 	<change-node-type path="/api/namespace//boxed[field/@cname='mini_object']">struct</change-node-type>
 	<attr path="/api/namespace//struct[field/@cname='mini_object']" name="native">true</attr>