diff --git a/js/gdm/util.js b/js/gdm/util.js
index 7adeaebfa..83912b734 100644
--- a/js/gdm/util.js
+++ b/js/gdm/util.js
@@ -16,8 +16,8 @@ import * as SmartcardManager from '../misc/smartcardManager.js';
 
 const FprintManagerInfo = Gio.DBusInterfaceInfo.new_for_xml(
     loadInterfaceXML('net.reactivated.Fprint.Manager'));
-const FprintDeviceIface = loadInterfaceXML('net.reactivated.Fprint.Device');
-const FprintDeviceProxy = Gio.DBusProxy.makeProxyWrapper(FprintDeviceIface);
+const FprintDeviceInfo = Gio.DBusInterfaceInfo.new_for_xml(
+    loadInterfaceXML('net.reactivated.Fprint.Device'));
 
 Gio._promisify(Gdm.Client.prototype, 'open_reauthentication_channel');
 Gio._promisify(Gdm.Client.prototype, 'get_user_verifier');
@@ -361,9 +361,8 @@ export class ShellUserVerifier extends Signals.EventEmitter {
                 const [devicePath] = fprintManager.GetDefaultDeviceSync();
                 this._fprintManager = fprintManager;
 
-                const fprintDeviceProxy = new FprintDeviceProxy(Gio.DBus.system,
-                    'net.reactivated.Fprint', devicePath, null, null,
-                    Gio.DBusProxyFlags.NOT_CONNECT_SIGNALS);
+                const fprintDeviceProxy = this._getFingerprintDeviceProxy(devicePath);
+                fprintDeviceProxy.init(null);
                 this._setFingerprintReaderType(fprintDeviceProxy['scan-type']);
             } else {
                 // Ensure fingerprint service starts, but do not wait for it
@@ -377,6 +376,17 @@ export class ShellUserVerifier extends Signals.EventEmitter {
         }
     }
 
+    _getFingerprintDeviceProxy(devicePath) {
+        return new Gio.DBusProxy({
+            g_connection: Gio.DBus.system,
+            g_name: 'net.reactivated.Fprint',
+            g_object_path: devicePath,
+            g_interface_name: FprintDeviceInfo.name,
+            g_interface_info: FprintDeviceInfo,
+            g_flags: Gio.DBusProxyFlags.DO_NOT_CONNECT_SIGNALS,
+        });
+    }
+
     _handleFingerprintError(e) {
         this._fingerprintReaderType = FingerprintReaderType.NONE;
 
@@ -409,9 +419,8 @@ export class ShellUserVerifier extends Signals.EventEmitter {
         // Wrappers don't support null cancellable, so let's ignore it in case
         const args = cancellable ? [cancellable] : [];
         const [devicePath] = await fprintManager.GetDefaultDeviceAsync(...args);
-        const fprintDeviceProxy = new FprintDeviceProxy(Gio.DBus.system,
-            'net.reactivated.Fprint', devicePath, null, cancellable,
-            Gio.DBusProxyFlags.NOT_CONNECT_SIGNALS);
+        const fprintDeviceProxy = this._getFingerprintDeviceProxy(devicePath);
+        await fprintDeviceProxy.init_async(GLib.PRIORITY_DEFAULT, cancellable);
         this._setFingerprintReaderType(fprintDeviceProxy['scan-type']);
         this._updateDefaultService();