diff --git a/x11-toolkits/gtkada3/files/patch-src_gtkada-canvas__view.ads b/x11-toolkits/gtkada3/files/patch-src_gtkada-canvas__view.ads
new file mode 100644
index 000000000000..0a8c460c8a9b
--- /dev/null
+++ b/x11-toolkits/gtkada3/files/patch-src_gtkada-canvas__view.ads
@@ -0,0 +1,89 @@
+--- src/gtkada-canvas_view.ads.orig	2014-05-23 15:49:01 UTC
++++ src/gtkada-canvas_view.ads
+@@ -372,7 +372,7 @@ package Gtkada.Canvas_View is
+ 
+    function Is_Link
+      (Self : not null access Abstract_Item_Record)
+-      return Boolean is (False);
++      return Boolean is abstract;
+    --  Whether this item should be considered as a link between two other
+    --  items.
+    --  Such links have a few specific behavior: for instance, they cannot be
+@@ -448,7 +448,7 @@ package Gtkada.Canvas_View is
+    function Edit_Widget
+      (Self  : not null access Abstract_Item_Record;
+       View  : not null access Canvas_View_Record'Class)
+-      return Gtk.Widget.Gtk_Widget is (null);
++      return Gtk.Widget.Gtk_Widget is abstract;
+    --  Return the widget to use for in-place editing of the item.
+    --  null should be returned when the item is not editable in place.
+    --  It is the responsibility of the returned widget to monitor events and
+@@ -463,7 +463,7 @@ package Gtkada.Canvas_View is
+ 
+    function Parent
+      (Self : not null access Abstract_Item_Record)
+-      return Abstract_Item is (null);
++      return Abstract_Item is abstract;
+    --  Return the item inside which Self is contained.
+    --  null is returned for toplevel items, in which case the coordinates of
+    --  the bounding box are model coordinats. Otherwise, the coordinates are
+@@ -478,7 +478,7 @@ package Gtkada.Canvas_View is
+      (Self     : not null access Abstract_Item_Record;
+       At_Point : Model_Point;
+       Context  : Draw_Context)
+-      return Abstract_Item is (Self);
++      return Abstract_Item is abstract;
+    --  Return the inner-most item at the specific coordinates in Self (or
+    --  Self itself).
+ 
+@@ -509,7 +509,7 @@ package Gtkada.Canvas_View is
+ 
+    function Is_Invisible
+      (Self : not null access Abstract_Item_Record)
+-     return Boolean is (False);
++     return Boolean is abstract;
+    --  True if Self has no filling or stroke information (and therefore is
+    --  invisible even when displayed, although some of its children might be
+    --  visible).
+@@ -526,6 +526,19 @@ package Gtkada.Canvas_View is
+    --  It is easier to derive from this type when you want to create your own
+    --  items, unless you want complete control of the data storage.
+ 
++   overriding function Is_Link
++     (Self : not null access Canvas_Item_Record) return Boolean is (False);
++   overriding function Parent
++     (Self : not null access Canvas_Item_Record)
++      return Abstract_Item is (null);
++   overriding function Is_Invisible
++     (Self : not null access Canvas_Item_Record)
++     return Boolean is (False);
++   function Inner_Most_Item
++     (Self     : not null access Canvas_Item_Record;
++      At_Point : Model_Point;
++      Context  : Draw_Context)
++      return Abstract_Item is (Self);
+    overriding function Position
+      (Self : not null access Canvas_Item_Record) return Gtkada.Style.Point;
+    overriding function Contains
+@@ -1583,6 +1596,21 @@ package Gtkada.Canvas_View is
+    --  Return the computed points for the link.
+    --  Do not free or store the result
+ 
++   overriding function Is_Invisible
++     (Self : not null access Canvas_Link_Record)
++     return Boolean is (False);
++   overriding function Inner_Most_Item
++     (Self     : not null access Canvas_Link_Record;
++      At_Point : Model_Point;
++      Context  : Draw_Context)
++      return Abstract_Item is (null);
++   overriding function Parent
++     (Self : not null access Canvas_Link_Record)
++      return Abstract_Item is (null);
++   overriding function Edit_Widget
++     (Self  : not null access Canvas_Link_Record;
++      View  : not null access Canvas_View_Record'Class)
++      return Gtk.Widget.Gtk_Widget is (null);
+    overriding procedure Destroy
+      (Self     : not null access Canvas_Link_Record;
+       In_Model : not null access Canvas_Model_Record'Class);