diff --git a/font/sfnt/example_test.go b/font/sfnt/example_test.go
index baddcfe..3e40a71 100644
--- a/font/sfnt/example_test.go
+++ b/font/sfnt/example_test.go
@@ -16,7 +16,7 @@ import (
 	"golang.org/x/image/vector"
 )
 
-func ExampleRasterizeGlyph() {
+func Example_rasterizeGlyph() {
 	const (
 		ppem    = 32
 		width   = 24