diff --git a/src/Avalonia.Controls/SelectableTextBlock.cs b/src/Avalonia.Controls/SelectableTextBlock.cs
index b0fd78b321..56eade0cd4 100644
--- a/src/Avalonia.Controls/SelectableTextBlock.cs
+++ b/src/Avalonia.Controls/SelectableTextBlock.cs
@@ -146,7 +146,7 @@ namespace Avalonia.Controls
         /// </summary>
         public void SelectAll()
         {
-            var text = Text;
+            var text = HasComplexContent ? Inlines?.Text : Text;
 
             SetCurrentValue(SelectionStartProperty, 0);
             SetCurrentValue(SelectionEndProperty, text?.Length ?? 0);