diff --git a/exp/sprite/portable/portable.go b/exp/sprite/portable/portable.go
index 7a7aecc..66b9f79 100644
--- a/exp/sprite/portable/portable.go
+++ b/exp/sprite/portable/portable.go
@@ -187,7 +187,7 @@
 	// TODO(nigeltao): is the caller or callee responsible for detecting
 	// transforms that are simple copies or scales, for which there are faster
 	// implementations in the xdraw package.
-	xdraw.ApproxBiLinear.Transform(dst, &m, src, srcb, xdraw.Op(op), &xdraw.Options{
+	xdraw.ApproxBiLinear.Transform(dst, m, src, srcb, xdraw.Op(op), &xdraw.Options{
 		SrcMask: mask,
 	})
 }