diff --git a/src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Rendering/VisualLine.cs b/src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Rendering/VisualLine.cs
index 4d8ef56fc8..2fc7b960f9 100644
--- a/src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Rendering/VisualLine.cs
+++ b/src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Rendering/VisualLine.cs
@@ -454,5 +454,15 @@ namespace ICSharpCode.AvalonEdit.Rendering
 			this.Height = pos;
 			drawingContext.Close();
 		}
+		
+		protected override GeometryHitTestResult HitTestCore(GeometryHitTestParameters hitTestParameters)
+		{
+			return null;
+		}
+		
+		protected override HitTestResult HitTestCore(PointHitTestParameters hitTestParameters)
+		{
+			return null;
+		}
 	}
 }