diff --git a/src/AdvancedCalculator/Views/MainView.axaml b/src/AdvancedCalculator/Views/MainView.axaml
index 7beff7c..dba5f04 100644
--- a/src/AdvancedCalculator/Views/MainView.axaml
+++ b/src/AdvancedCalculator/Views/MainView.axaml
@@ -35,7 +35,7 @@
           <ListBox ItemsSource="{Binding Variables}" SelectedIndex="-1"
                    AutomationProperties.Name="Variables list">
             <ListBox.ItemTemplate>
-              <DataTemplate x:DataType="m:VariableItem">
+              <DataTemplate>
                 <Button Background="Transparent" BorderThickness="0" Padding="8" MinHeight="44"
                         x:DataType="{x:Null}"
                         AutomationProperties.Name="Insert variable"
@@ -69,8 +69,8 @@
         <ListBox Grid.Row="1" BorderThickness="0"
                  ItemsSource="{x:Static m:FunctionDefinitionItem.DefinedFunctions}"
                  AutomationProperties.Name="Functions list">
-          <ListBox.ItemTemplate>
-              <DataTemplate x:DataType="m:FunctionDefinitionItem">
+            <ListBox.ItemTemplate>
+              <DataTemplate>
                 <Button Background="Transparent" BorderThickness="0" Padding="8" MinHeight="44"
                         x:DataType="{x:Null}"
                         AutomationProperties.Name="Insert function"