diff --git a/editor/code_editor.cpp b/editor/code_editor.cpp
index d0e69b7adc8..7818f854844 100644
--- a/editor/code_editor.cpp
+++ b/editor/code_editor.cpp
@@ -1261,7 +1261,7 @@ void CodeTextEditor::clone_lines_down() {
 	text_editor->cursor_set_line(cursor_new_line);
 	text_editor->cursor_set_column(cursor_new_column);
 	if (selection_active) {
-		text_editor->select(to_line, to_column, 2 * to_line - from_line, 2 * to_column - from_column);
+		text_editor->select(to_line, to_column, 2 * to_line - from_line, to_line == from_line ? 2 * to_column - from_column : to_column);
 	}
 
 	text_editor->end_complex_operation();