diff --git a/object.go b/object.go
index 723dec4..2d0187f 100644
--- a/object.go
+++ b/object.go
@@ -8,8 +8,6 @@ import "git.tebibyte.media/tomo/tomo/event"
 import "git.tebibyte.media/tomo/tomo/input"
 import "git.tebibyte.media/tomo/tomo/canvas"
 
-type Gap image.Point
-
 // Side represents one side of a rectangle.
 type Side int; const (
 	SideTop Side = iota
@@ -171,7 +169,7 @@ type TextBox interface {
 // according to a layout rule.
 type ContainerBox interface {
 	ContentBox
-	SetGap    (Gap)
+	SetGap    (image.Point)
 	Add       (Object)
 	Delete    (Object)
 	Insert    (child Object, before Object)