diff --git a/internal/ui/image.go b/internal/ui/image.go
index a4521fa55..12b3ec1d5 100644
--- a/internal/ui/image.go
+++ b/internal/ui/image.go
@@ -52,6 +52,9 @@ func newScreenFramebufferImage(width, height int) *Image {
 }
 
 func (i *Image) MarkDisposed() {
+	if i.mipmap == nil {
+		return
+	}
 	i.mipmap.MarkDisposed()
 	i.mipmap = nil
 }