diff --git a/run.go b/run.go
index 355108aac..1505d164c 100644
--- a/run.go
+++ b/run.go
@@ -50,6 +50,8 @@ type Game interface {
 	//
 	// Layout is called almost every frame.
 	//
+	// It is ensured that Layout is invoked before Update is called in the first frame.
+	//
 	// If Layout returns non-positive numbers, the caller can panic.
 	//
 	// You can return a fixed screen size if you don't care, or you can also return a calculated screen size
diff --git a/uicontext.go b/uicontext.go
index de87e02fa..300c45e66 100644
--- a/uicontext.go
+++ b/uicontext.go
@@ -155,6 +155,8 @@ func (c *uiContext) Update() error {
 }
 
 func (c *uiContext) update() error {
+	c.updateOffscreen()
+
 	updateCount := clock.Update(MaxTPS())
 
 	// Ensure that Update is called once before Draw so that Update can be used for initialization.
@@ -174,8 +176,6 @@ func (c *uiContext) update() error {
 		uiDriver().ResetForFrame()
 	}
 
-	c.updateOffscreen()
-
 	if updateCount > 0 {
 		if IsScreenClearedEveryFrame() {
 			c.offscreen.Clear()