diff --git a/decor/on_abort.go b/decor/on_abort.go
index 7ece120..10ff670 100644
--- a/decor/on_abort.go
+++ b/decor/on_abort.go
@@ -9,6 +9,9 @@
 //	`message` message to display on abort event
 //
 func OnAbort(decorator Decorator, message string) Decorator {
+	if decorator == nil {
+		return nil
+	}
 	d := &onAbortWrapper{
 		Decorator: decorator,
 		msg:       message,
diff --git a/decor/on_complete.go b/decor/on_complete.go
index c7c9e4d..2ada2b3 100644
--- a/decor/on_complete.go
+++ b/decor/on_complete.go
@@ -8,6 +8,9 @@
 //	`message` message to display on complete event
 //
 func OnComplete(decorator Decorator, message string) Decorator {
+	if decorator == nil {
+		return nil
+	}
 	d := &onCompleteWrapper{
 		Decorator: decorator,
 		msg:       message,