diff --git a/widget/widget.go b/widget/widget.go
index fb38511750..557e999031 100644
--- a/widget/widget.go
+++ b/widget/widget.go
@@ -11,6 +11,8 @@ import (
 
 // BaseWidget provides a helper that handles basic widget behaviours.
 type BaseWidget struct {
+	noCopy noCopy // so `go vet` can complain if a widget is passed by value (copied)
+
 	size     fyne.Size
 	position fyne.Position
 	Hidden   bool
@@ -212,3 +214,9 @@ const (
 	// Since: 2.5
 	Adaptive Orientation = 2
 )
+
+type noCopy struct{}
+
+func (*noCopy) Lock() {}
+
+func (*noCopy) Unlock() {}