diff --git a/flex.go b/flex.go
index e5bf5e0..7235614 100644
--- a/flex.go
+++ b/flex.go
@@ -28,7 +28,7 @@ type Flex struct {
 	*Box
 
 	// The items to be positioned.
-	items []flexItem
+	items []*flexItem
 
 	// FlexRow or FlexColumn.
 	direction int
@@ -86,7 +86,7 @@ func (f *Flex) SetFullScreen(fullScreen bool) *Flex {
 // You can provide a nil value for the primitive. This will still consume screen
 // space but nothing will be drawn.
 func (f *Flex) AddItem(item Primitive, fixedSize, proportion int, focus bool) *Flex {
-	f.items = append(f.items, flexItem{Item: item, FixedSize: fixedSize, Proportion: proportion, Focus: focus})
+	f.items = append(f.items, &flexItem{Item: item, FixedSize: fixedSize, Proportion: proportion, Focus: focus})
 	return f
 }