tracker-store: fix build with vala masterabderrahim/build-fix

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tracker-store/tracker-dbus.vala b/src/tracker-store/tracker-dbus.vala
index 82387d76e..dbbd775d6 100644
--- a/src/tracker-store/tracker-dbus.vala
+++ b/src/tracker-store/tracker-dbus.vala
@@ -122,7 +122,7 @@ public class Tracker.DBus {
 		return true;
 	}
 
-	static void name_owner_changed_cb (DBusConnection connection, string sender_name, string object_path, string interface_name, string signal_name, Variant parameters) {
+	static void name_owner_changed_cb (DBusConnection connection, string? sender_name, string object_path, string interface_name, string signal_name, Variant parameters) {
 
 		unowned string name, old_owner, new_owner;
 		parameters.get ("(&s&s&s)", out name, out old_owner, out new_owner);