diff --git a/application.go b/application.go
index 6391b72..fca53d5 100644
--- a/application.go
+++ b/application.go
@@ -18,6 +18,10 @@ type Application interface {
 	// Init performs the initial setup of the application. This behavior
 	// should return a window if it creates one.
 	Init () (tomo.Window, error)
+
+	// Stop stops the application and does not return until all ongoing
+	// operations have been completely shut down.
+	Stop ()
 }
 
 // ApplicationURLOpener is an application that can open a URL.