diff --git a/MANUAL.txt b/MANUAL.txt
index 64884e69a..bdb5bf082 100644
--- a/MANUAL.txt
+++ b/MANUAL.txt
@@ -1313,7 +1313,7 @@ header when requesting a document from a URL:
         To produce a custom `reference.docx`, first get a copy of
         the default `reference.docx`: `pandoc
         -o custom-reference.docx --print-default-data-file reference.docx`.
-        Then open `custom-reference.docx` in Word, modify the
+        Then open `custom-reference.docx` in Word or LibreOffice, modify the
         styles as you wish, and save the file.  For best
         results, do not make changes to this file other than
         modifying the styles used by pandoc: