diff --git a/web/assemble.sh b/web/assemble.sh
index 4f310215..6935bd80 100755
--- a/web/assemble.sh
+++ b/web/assemble.sh
@@ -12,7 +12,8 @@
 #
 # Usage: web/assemble.sh [OUT_DIR] [CACHE_BUST_TOKEN]
 #
-# The token cache-busts the two generated bundles. Pages serves everything
+# The token cache-busts the two generated bundles and names the build in the
+# page's own #build-version (improvise-oujb). Pages serves everything
 # `max-age=600` and the wasm-pack filenames carry no content hash, so for ten
 # minutes after a deploy a returning visitor runs the PREVIOUS build — which
 # during improvise-9x6 debugging made a shipped fix look like it had not
@@ -84,7 +85,7 @@ sedi "s|'improvise_worker_server_bg\.wasm'|'improvise_worker_server_bg.wasm?v=${
 # (improvise-w8ih). Its argument is FILE PATTERN, five times -- the page's own
 # #build-version among them (improvise-oujb).
 sh "$root/scripts/assemble-stamp.sh" \
-  "$app/index.html" "id=\"build-version\" title=\"Build this page was assembled from\">${token}<" \
+  "$app/index.html" "id=\"build-version\">${token}<" \
   "$app/app.js" "pkg/improvise_wasm_client.js?v=${token}" \
   "$app/worker.js" "worker-pkg/improvise_worker_server.js?v=${token}" \
   "$app/pkg/improvise_wasm_client.js" "improvise_wasm_client_bg.wasm?v=${token}" \
diff --git a/web/index.html b/web/index.html
index 3d19d84d..619555f6 100644
--- a/web/index.html
+++ b/web/index.html
@@ -44,7 +44,7 @@
         or commit it assembled from (improvise-oujb). A page served straight
         out of web/ was never assembled and honestly says so.
       -->
-      <span id="build-version" title="Build this page was assembled from">unstamped</span>
+      <span title="Build this page was assembled from" id="build-version">unstamped</span>
     </header>
 
     <!--