diff --git a/navig-driver.js b/navig-driver.js
index 796cf6f5392546be17e3d32c6ef6a906478641c8..e2464b12719100675aa05f1a21228f5e28e6d257 100644
--- a/navig-driver.js
+++ b/navig-driver.js
@@ -90,6 +90,7 @@ var source_files = [
 source_files.reduce((select, file_content) => {
   var option = document.createElement('option');
   option.textContent = file_content;
+  option.value = file_content;
   select.append(option);
   return select;
 }, $('#select_source_code'));