diff --git a/ui/spacing.go b/ui/spacing.go
index 6e4961c..f3c2c98 100644
--- a/ui/spacing.go
+++ b/ui/spacing.go
@@ -81,7 +81,7 @@ func (s *Spacing) Center() {
 }
 
 func (s *Spacing) DesiredSize(ctx Context, size geom.PointF32) geom.PointF32 {
-	var content = s.Proxy.DesiredSize(ctx, size)
+	var content = s.Proxy.DesiredSize(ctx, geom.PtF32(s.Width.Zero(size.X), s.Height.Zero(size.Y)))
 	var w, h = s.Width.Zero(content.X), s.Height.Zero(content.Y)
 	var margin = func(l *Length) float32 {
 		var v = l.Value()