diff --git a/genericWindow.go b/genericWindow.go
index 78292ca..0232502 100644
--- a/genericWindow.go
+++ b/genericWindow.go
@@ -111,9 +111,12 @@ func NewGenericWindow(title string, grouptxt string) *GenericWindow {
 	// gw.Win.Make()
 
 	gw.Win.Custom = func() {
-		log.Log(WARN, "Found Window close. setting hidden=true")
+		log.Log(WARN, "GenericWindow.Custom()")
 		// sets the hidden flag to false so Toggle() works
 		gw.Win.Hide()
+		if gw.Custom != nil {
+			gw.Custom()
+		}
 	}
 	gw.Shelf = gw.Win.NewHorizontalBox("Shelf")
 	// gw.Shelf.Vertical().SetProgName("ShelfBox")