diff --git a/drawer.go b/drawer.go
index 72b5708e421cffb5a7e367a0e31d86632aa2fedd..4ee50c87393e560113dd226d06ee5ecb25a88cb6 100644
--- a/drawer.go
+++ b/drawer.go
@@ -14,7 +14,7 @@ package pixel
 // Picture.
 //
 // Whenever you change the Triangles, call Dirty to notify Drawer that Triangles changed. You don't
-// need to notify Drawer about a change of Picture.
+// need to notify Drawer about a change of the Picture.
 type Drawer struct {
 	Triangles Triangles
 	Picture   Picture