diff --git a/README.md b/README.md
index e492164..904b07d 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,8 @@ Each has its own README with build instructions and details.
 * [memo_template](memo_template/README.md) — a short memo
 * [letter_template](letter_template/README.md) — a letter
 * [slides_template](slides_template/README.md) — presentation slides, in ltx-talk
-* [poster_template](poster_template/README.md) — a conference poster, in beamer
+* [poster_template](poster_template/README.md) — a conference poster, in
+  beamer; unmaintained and not accessible
 
 
 ## Dependencies
diff --git a/poster_template/README.md b/poster_template/README.md
index 1096b1e..9a084a7 100644
--- a/poster_template/README.md
+++ b/poster_template/README.md
@@ -1,7 +1,12 @@
 # Poster Template
 
+**Unmaintained.** The lab has essentially stopped using it, and it is the one
+template that cannot produce an accessible PDF. Expect to fix things yourself
+if you start a poster from it.
+
 A conference poster on beamer with beamerposter, styled by the Torino theme
-and `beamercolorthememako.sty`. The source file is `main.tex`.
+and `beamercolorthememako.sty`. The source file is `main.tex`. There is no
+`new_tex_document` type for it; copy the directory by hand.
 
 ```
 latexmk -f -lualatex main.tex