diff --git a/srcpkgs/switchboard-plug-printers/patches/fix-signal_subscribe.patch b/srcpkgs/switchboard-plug-printers/patches/fix-signal_subscribe.patch
new file mode 100644
index 00000000000..fa2a534e4f1
--- /dev/null
+++ b/srcpkgs/switchboard-plug-printers/patches/fix-signal_subscribe.patch
@@ -0,0 +1,11 @@
+--- src/CUPSNotifier.vala	2018-11-28 12:34:33.000000000 +0100
++++ src/CUPSNotifier.vala	2021-01-29 19:26:11.191992396 +0100
+@@ -63,7 +63,7 @@
+         Bus.get_proxy.begin<NotifierDBus> (BusType.SYSTEM, "org.cups.cupsd.Notifier", "/org/cups/cupsd/Notifier", GLib.DBusProxyFlags.NONE, null, (obj, res) => {
+             try {
+                 dbus_notifier = Bus.get_proxy.end (res);
+-                ((GLib.DBusProxy) dbus_notifier).g_connection.signal_subscribe (null, "org.cups.cupsd.Notifier", null, "/org/cups/cupsd/Notifier", null, GLib.DBusSignalFlags.NONE, subscription_callback);
++                ((GLib.DBusProxy) dbus_notifier).g_connection.signal_subscribe (null, "org.cups.cupsd.Notifier", null, "/org/cups/cupsd/Notifier", null, GLib.DBusSignalFlags.NONE, (GLib.DBusSignalCallback)subscription_callback);
+             } catch (IOError e) {
+                 critical (e.message);
+             }