diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/RichTextBox/RichTextBox.cs b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/RichTextBox/RichTextBox.cs
index 88246526..bc2240a7 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/RichTextBox/RichTextBox.cs
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/RichTextBox/RichTextBox.cs
@@ -72,7 +72,11 @@ namespace Microsoft.Windows.Controls
             }
             set
             {
-                _textFormatter = value;
+                if (_textFormatter != value)
+                {
+                    _textFormatter = value;
+                    _textFormatter.SetText(Document, Text);
+                }
             }
         }