diff --git a/vector_renderer.go b/vector_renderer.go
index eb2fc83..8865c61 100644
--- a/vector_renderer.go
+++ b/vector_renderer.go
@@ -140,7 +140,7 @@ func (vr *vectorRenderer) ArcTo(cx, cy int, rx, ry, startAngle, delta float64) {
 
 // Close closes a shape.
 func (vr *vectorRenderer) Close() {
-	vr.p = append(vr.p, fmt.Sprintf("Z"))
+	vr.p = append(vr.p, "Z")
 }
 
 // Stroke draws the path with no fill.