diff --git a/src/mpris.vala b/src/mpris.vala
index cb5fa48..ed9763b 100644
--- a/src/mpris.vala
+++ b/src/mpris.vala
@@ -221,6 +221,9 @@ class MprisPlayer : Object {
                     dbus_name = "CanSeek";
                     dbus_value = this.can_seek;
                     break;
+                case "api":
+                    // internal, ignored
+                    return;
                 default:
                     warning (@"unknown mpris player property $(p.name)");
                     return;