diff --git a/src/Views/Preference.axaml.cs b/src/Views/Preference.axaml.cs
index 7b50b9a1..1dd77b50 100644
--- a/src/Views/Preference.axaml.cs
+++ b/src/Views/Preference.axaml.cs
@@ -1,9 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.Globalization;
-using System.IO;
 using System.Threading.Tasks;
-
+using Avalonia;
 using Avalonia.Collections;
 using Avalonia.Controls;
 using Avalonia.Input;
@@ -52,10 +51,13 @@ namespace SourceGit.Views
             set;
         }
 
+        public static readonly StyledProperty<string> GPGExecutableFileProperty =
+            AvaloniaProperty.Register<Preference, string>(nameof(GPGExecutableFile));
+
         public string GPGExecutableFile
         {
-            get;
-            set;
+            get => GetValue(GPGExecutableFileProperty);
+            set => SetValue(GPGExecutableFileProperty, value);
         }
 
         public string GPGUserKey