diff --git a/navig-driver.js b/navig-driver.js
index 8bb3fe6d59d3ca75ee0685418824c918f9068f55..2da2c12b61f8deed23eeb8406543fac028ded6b5 100644
--- a/navig-driver.js
+++ b/navig-driver.js
@@ -90,6 +90,7 @@ var source_files = [
 source_files.reduce((select, file_content) => {
   let option = document.createElement('option');
   option.textContent = file_content;
+  option.value = file_content;
   select.append(option);
   return select;
 }, $('#select_source_code'));