diff --git a/vala/abstract_abstract/abstract_abstract.vala b/vala/abstract_abstract/abstract_abstract.vala
new file mode 100644
index 0000000..9b3b7ec
--- /dev/null
+++ b/vala/abstract_abstract/abstract_abstract.vala
@@ -0,0 +1,38 @@
+using GObject.Plugins;
+
+namespace GObject.Plugins {
+
+	public interface IPlugabble : Object {
+		public abstract string get_name ();
+	}
+
+	public abstract class Plugin : Object, IPlugabble {
+		public abstract string get_name ();
+	}
+
+	public abstract class PluginTypeA : Plugin {
+		// don't write anything here
+	}
+
+	public class PluginTypeA1 : PluginTypeA {
+		public override string get_name () { return "Any object of PluginTypeA1 class"; }
+	}
+
+	public class Module {
+		Type t;
+
+		public Module (Type t) {
+			this.t = t;
+		}
+
+		public IPlugabble create_instance () {
+			return Object.new (t) as IPlugabble;
+		}
+	}
+}
+
+void main () {
+	var m = new Module (typeof (PluginTypeA1));
+	var o = m.create_instance ();
+	stdout.printf ("o.get_name () = %s", o.get_name ());
+}
diff --git a/vala/abstract_abstract/run.sh b/vala/abstract_abstract/run.sh
new file mode 100755
index 0000000..09b8463
--- /dev/null
+++ b/vala/abstract_abstract/run.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+valac abstract_abstract.vala && ./abstract_abstract