diff --git a/Elwig/Models/Member.cs b/Elwig/Models/Member.cs
index 95a5133..561dfff 100644
--- a/Elwig/Models/Member.cs
+++ b/Elwig/Models/Member.cs
@@ -130,8 +130,11 @@ namespace Elwig.Models {
         [Column("default_kgnr")]
         public int? DefaultKgNr { get; set; }
 
-        [Column("default_contact")]
-        public string DefaultContact { get; set; }
+        [Column("contact_postal")]
+        public bool ContactViaPost { get; set; }
+
+        [Column("contact_email")]
+        public bool ContactViaEmail { get; set; }
 
         [Column("comment")]
         public string? Comment { get; set; }
diff --git a/Elwig/Windows/MemberAdminWindow.xaml b/Elwig/Windows/MemberAdminWindow.xaml
index d7f0476..074d0c8 100644
--- a/Elwig/Windows/MemberAdminWindow.xaml
+++ b/Elwig/Windows/MemberAdminWindow.xaml
@@ -289,12 +289,12 @@
                          TextChanged="TextBox_TextChanged"/>
 
                 <Label Content="Kontaktart:" Margin="10,220,0,0" Grid.Column="0"/>
-                <RadioButton x:Name="ContactPostInput" GroupName="DefaultContact" Content="Post" IsEnabled="False"
-                             Checked="RadioButton_Changed" Unchecked="RadioButton_Changed"
-                             HorizontalAlignment="Left" Margin="0,225,0,0" VerticalAlignment="Top" Grid.Column="1" Grid.ColumnSpan="2"/>
-                <RadioButton x:Name="ContactEmailInput" GroupName="DefaultContact" Content="E-Mail" IsEnabled="False"
-                             Checked="RadioButton_Changed" Unchecked="RadioButton_Changed"
-                             HorizontalAlignment="Left" Margin="60,225,0,0" VerticalAlignment="Top" Grid.Column="1" Grid.ColumnSpan="2"/>
+                <CheckBox x:Name="ContactPostalInput" Content="Post" IsEnabled="False"
+                          Checked="CheckBox_Changed" Unchecked="CheckBox_Changed"
+                          HorizontalAlignment="Left" Margin="0,225,0,0" VerticalAlignment="Top" Grid.Column="1" Grid.ColumnSpan="2"/>
+                <CheckBox x:Name="ContactEmailInput" Content="E-Mail" IsEnabled="False"
+                          Checked="CheckBox_Changed" Unchecked="CheckBox_Changed"
+                          HorizontalAlignment="Left" Margin="60,225,0,0" VerticalAlignment="Top" Grid.Column="1" Grid.ColumnSpan="2"/>
 
                 <Label Content="Gebundene Fläche:" Margin="10,250,0,0" Grid.Column="0"/>
                 <TextBlock x:Name="AreaCommitment" Text="- m²"
diff --git a/Elwig/Windows/MemberAdminWindow.xaml.cs b/Elwig/Windows/MemberAdminWindow.xaml.cs
index fef8467..cc3de13 100644
--- a/Elwig/Windows/MemberAdminWindow.xaml.cs
+++ b/Elwig/Windows/MemberAdminWindow.xaml.cs
@@ -99,7 +99,8 @@ namespace Elwig.Windows {
             if (Context.Branches.Count() == 1)
                 BranchInput.SelectedItem = Context.Branches.First();
             ActiveInput.IsChecked = true;
-            ContactPostInput.IsChecked = true;
+            ContactPostalInput.IsChecked = true;
+            ContactEmailInput.IsChecked = false;
             FillOriginalValues();
             ValidateRequiredInputs();
         }
@@ -289,9 +290,8 @@ namespace Elwig.Windows {
             m.ZwstId = ((Branch)BranchInput.SelectedItem).ZwstId;
             m.DefaultKgNr = ((AT_Kg)DefaultKgInput.SelectedItem).KgNr;
             m.Comment = (CommentInput.Text == "") ? null : CommentInput.Text;
-            m.DefaultContact = "post";
-            if (ContactPostInput.IsChecked ?? false) m.DefaultContact = "post";
-            if (ContactEmailInput.IsChecked ?? false) m.DefaultContact = "email";
+            m.ContactViaPost = ContactPostalInput.IsChecked ?? false;
+            m.ContactViaEmail = ContactEmailInput.IsChecked ?? false;
 
             EntityEntry<Member>? tr = null;
             try {
@@ -400,10 +400,8 @@ namespace Elwig.Windows {
             ActiveInput.IsChecked = m.IsActive;
             VollLieferantInput.IsChecked = m.IsVollLieferant;
             FunkionärInput.IsChecked = m.IsFunktionär;
-            switch (m.DefaultContact) {
-                case "post": ContactPostInput.IsChecked = true; break;
-                case "email": ContactEmailInput.IsChecked = true; break;
-            }
+            ContactPostalInput.IsChecked = m.ContactViaPost;
+            ContactEmailInput.IsChecked = m.ContactViaEmail;
 
             AreaCommitment.Text = $"{m.ActiveContracts.Select(c => c.Area).Sum():N0} m²";