diff --git a/samples/AvalonEdit.Sample/MyCompletionData.cs b/samples/AvalonEdit.Sample/MyCompletionData.cs
index 8295e25c33..7ab77048a3 100644
--- a/samples/AvalonEdit.Sample/MyCompletionData.cs
+++ b/samples/AvalonEdit.Sample/MyCompletionData.cs
@@ -48,6 +48,8 @@ namespace AvalonEdit.Sample
 			get { return "Description for " + this.Text; }
 		}
 		
+		public double Priority { get { return 0; } }
+		
 		public void Complete(TextArea textArea, ISegment completionSegment, EventArgs insertionRequestEventArgs)
 		{
 			textArea.Document.Replace(completionSegment, this.Text);