diff --git a/srv/poe_manager/app.py b/srv/poe_manager/app.py
index 52596c4..1b5464e 100644
--- a/srv/poe_manager/app.py
+++ b/srv/poe_manager/app.py
@@ -241,7 +241,7 @@ def devices():
                         WHERE mac=?
                     """, (switch_hostname, old_mac))
                     conn.commit()
-                    flash(f"Switch von {device_name} geändert: {old_switch} → {switch_hostname} or 'kein Switch'")
+                    flash(f"Switch von {device_name} geändert: {old_switch} → {switch_hostname or 'Kein Switch'}")
                 except sqlite3.IntegrityError:
                     flash("Fehler beim Ändern des Switch!")
                 return redirect(url_for('devices'))