diff --git a/vapi/gobject-2.0.vapi b/vapi/gobject-2.0.vapi
index a3876d3..3b0d70f 100644
--- a/vapi/gobject-2.0.vapi
+++ b/vapi/gobject-2.0.vapi
@@ -98,15 +98,15 @@ namespace GLib {
 	public interface TypePlugin {
 	}
 
-	[CCode (lower_case_csuffix = "type_module")]
-	public class TypeModule : Object, TypePlugin {
+	[CCode (lower_case_csuffix = "type_module", unref_function = "")]
+	public abstract class TypeModule : Object, TypePlugin {
 		public bool use ();
 		public void unuse ();
 		public void set_name (string name);
 		[NoWrapper]
-		public virtual bool load ();
+		public abstract bool load ();
 		[NoWrapper]
-		public virtual void unload ();
+		public abstract void unload ();
 	}
 
 	[CCode (type_id = "G_TYPE_PARAM", ref_function = "g_param_spec_ref", unref_function = "g_param_spec_unref", param_spec_function = "g_param_spec_param", get_value_function = "g_value_get_param", set_value_function = "g_value_set_param", take_value_function = "g_value_take_param")]