diff --git a/MANUAL.txt b/MANUAL.txt
index 57b9f3b2c..f0d3c8965 100644
--- a/MANUAL.txt
+++ b/MANUAL.txt
@@ -972,7 +972,9 @@ header when requesting a document from a URL:
 :   Specify whether footnotes (and references, if `reference-links` is
     set) are placed at the end of the current (top-level) block, the
     current section, or the document. The default is
-    `document`. Currently only affects the markdown and HTML writers.
+    `document`. Currently this option only affects the
+    `markdown`, `muse`, `html`, `epub`, `slidy`, `s5`, `slideous`,
+    `dzslides`, and `revealjs` writers.
 
 `--markdown-headings=setext`|`atx`