diff --git a/docfx_project/public/version-picker.js b/docfx_project/public/version-picker.js
index e1fb319..af3010e 100644
--- a/docfx_project/public/version-picker.js
+++ b/docfx_project/public/version-picker.js
@@ -94,9 +94,11 @@
             // on /versions/latest/. On every other page the highest-
             // numbered v* entry already represents the latest release
             // and surfacing both is redundant; on /versions/latest/ we
-            // NEED `latest` in the list because otherwise the picker
-            // would show no selected option and the reader would have
-            // no way to know which version they are viewing.
+            // NEED `latest` in the list because without it the browser auto-
+            // selects the first concrete version (whichever v* is top of
+            // the list), and choosing that same value doesn't fire
+            // `change`, so the reader can't navigate away to the
+            // concrete-version URL.
             if (v.version === 'latest' && currentVersion !== 'latest') return;
             var opt = document.createElement('option');
             opt.value = v.url;