diff --git a/lisp/org.el b/lisp/org.el
index 947037559..ad2394ae3 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -3267,7 +3267,7 @@ When using LaTeXML set this option to
 	  (string :tag "\nShell command")))
 
 (defcustom org-latex-to-html-convert-command nil
-  "Command to convert LaTeX fragments to HTML.
+  "Shell command to convert LaTeX fragments to HTML.
 This command is very open-ended: the output of the command will
 directly replace the LaTeX fragment in the resulting HTML.
 Replace format-specifiers in the command as noted below and use
@@ -3275,7 +3275,12 @@ Replace format-specifiers in the command as noted below and use
 %i:     The LaTeX fragment to be converted.
 
 For example, this could be used with LaTeXML as
-\"latexmlc \\='literal:%i\\=' --profile=math --preload=siunitx.sty 2>/dev/null\"."
+\"latexmlc \\='literal:%i\\=' --profile=math --preload=siunitx.sty 2>/dev/null\".
+
+The LaTeX fragment is replaced as is, without escaping special shell
+syntax.  It may be necessary to use single-quotes around \\='%i\\=', not
+double-quotes.  Else a math fragment such as \"$y = 200$\" may be
+expanded to \" = 200\"."
   :group 'org-latex
   :package-version '(Org . "9.4")
   :type '(choice