diff --git a/SourceGen/WpfGui/EditDataOperand.xaml b/SourceGen/WpfGui/EditDataOperand.xaml
index b394c46..1d4fe14 100644
--- a/SourceGen/WpfGui/EditDataOperand.xaml
+++ b/SourceGen/WpfGui/EditDataOperand.xaml
@@ -101,7 +101,7 @@ limitations under the License.
                                  GroupName="Display" Content="_ASCII (low or high) character"
                                  Checked="SimpleDisplay_CheckedChanged"/>
                     <RadioButton Name="radioSimpleDataPetscii" Grid.Column="1" Grid.Row="1"
-                                 GroupName="Display" Content="C64 _PETSCII character" Margin="0,4,0,0"
+                                 GroupName="Display" Content="C64 PE_TSCII character" Margin="0,4,0,0"
                                  Checked="SimpleDisplay_CheckedChanged"/>
                     <RadioButton Name="radioSimpleDataScreenCode" Grid.Column="1" Grid.Row="2"
                                  GroupName="Display" Content="C64 S_creen character" Margin="0,4,0,0"
diff --git a/SourceGen/WpfGui/EditInstructionOperand.xaml b/SourceGen/WpfGui/EditInstructionOperand.xaml
index bf59c25..26a1c9f 100644
--- a/SourceGen/WpfGui/EditInstructionOperand.xaml
+++ b/SourceGen/WpfGui/EditInstructionOperand.xaml
@@ -87,7 +87,7 @@ limitations under the License.
                                  IsChecked="{Binding FormatBinary}"/>
                     <RadioButton GroupName="Main" Content="_ASCII (low or high) character" Margin="0,2,0,0"
                                  IsEnabled="{Binding IsFormatAsciiAllowed}" IsChecked="{Binding FormatAscii}"/>
-                    <RadioButton GroupName="Main" Content="C64 _PETSCII character" Margin="0,2,0,0"
+                    <RadioButton GroupName="Main" Content="C64 PE_TSCII character" Margin="0,2,0,0"
                                  IsEnabled="{Binding IsFormatPetsciiAllowed}" IsChecked="{Binding FormatPetscii}"/>
                     <RadioButton GroupName="Main" Content="C64 Sc_reen character" Margin="0,2,0,0"
                                  IsEnabled="{Binding IsFormatScreenCodeAllowed}" IsChecked="{Binding FormatScreenCode}"/>