diff --git a/src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Editing/SelectionMouseHandler.cs b/src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Editing/SelectionMouseHandler.cs
index 915e430054..66c9309c20 100644
--- a/src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Editing/SelectionMouseHandler.cs
+++ b/src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Editing/SelectionMouseHandler.cs
@@ -527,7 +527,7 @@ namespace ICSharpCode.AvalonEdit.Editing
 				pos.Y = textView.DocumentHeight - ExtensionMethods.Epsilon;
 			VisualLine line = textView.GetVisualLineFromVisualTop(pos.Y);
 			if (line != null) {
-				visualColumn = line.GetVisualColumn(line.TextLines.First(), positionRelativeToTextView.X, textArea.Selection.EnableVirtualSpace);
+				visualColumn = line.GetVisualColumn(line.TextLines.First(), pos.X, textArea.Selection.EnableVirtualSpace);
 				return line.GetRelativeOffset(visualColumn) + line.FirstDocumentLine.Offset;
 			}
 			return -1;