diff --git a/internal/system/system.go b/internal/system/system.go
index 0aa61f5..6f8d6c7 100644
--- a/internal/system/system.go
+++ b/internal/system/system.go
@@ -1,5 +1,6 @@
 package system
 
+import "io"
 import "image"
 import "git.tebibyte.media/tomo/tomo/canvas"
 
@@ -23,6 +24,7 @@ type BackendLink interface {
 // SurfaceLink wraps a Surface created by the backend implementation, allowing
 // the System a higher level of control over it.
 type SurfaceLink interface {
+	io.Closer
 	GetSurface () any
 	SetSize    (image.Rectangle)
 }