diff --git a/lib/config/wrapper.go b/lib/config/wrapper.go
index dcce23ec..b387b231 100644
--- a/lib/config/wrapper.go
+++ b/lib/config/wrapper.go
@@ -159,7 +159,7 @@ func (w *Wrapper) replaceLocked(to Configuration) error {
 
 func (w *Wrapper) notifyListeners(from, to Configuration) {
 	for _, sub := range w.subs {
-		go w.notifyListener(sub, from, to)
+		go w.notifyListener(sub, from.Copy(), to.Copy())
 	}
 }