diff --git a/cmd/microcloud/add.go b/cmd/microcloud/add.go
index 29d4ee2c2..39291e0e8 100644
--- a/cmd/microcloud/add.go
+++ b/cmd/microcloud/add.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"time"
 
@@ -113,6 +114,11 @@ func (c *cmdAdd) Run(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
+	// Exit early if no new systems got selected during the trust establishment session.
+	if len(cfg.systems) == 0 {
+		return errors.New("At least one new system has to be selected")
+	}
+
 	reverter := revert.New()
 	defer reverter.Fail()