diff --git a/gtk/ComboBoxText.cs b/gtk/ComboBoxText.cs
index a5f4c0914..e4a6e68eb 100644
--- a/gtk/ComboBoxText.cs
+++ b/gtk/ComboBoxText.cs
@@ -20,6 +20,8 @@
 
 namespace Gtk {
 
+	using System;
+
 	public partial class ComboBoxText {
 
 		protected ComboBoxText (bool has_entry) : base (IntPtr.Zero)
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index c9e2c4837..b9b0e5429 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -16,6 +16,7 @@ sources = 				\
 	BindingAttribute.cs		\
 	CellAreaBox.cs			\
 	ChildPropertyAttribute.cs	\
+	ComboBoxText.cs			\
 	Global.cs			\
 	ITreeNode.cs			\
 	Key.cs				\