diff --git a/dangerzone/conversion/doc_to_pixels.py b/dangerzone/conversion/doc_to_pixels.py
index a7a7776..3a07377 100644
--- a/dangerzone/conversion/doc_to_pixels.py
+++ b/dangerzone/conversion/doc_to_pixels.py
@@ -129,7 +129,9 @@ class DocumentToPixels(DangerzoneConverter):
             # At least .odt, .docx, .odg, .odp, .ods, and .pptx
             "application/zip": {
                 "type": "libreoffice",
-                # NOTE: Older `file` command cannot detect hwpx files properly.
+                # NOTE: `file` command < 5.45 cannot detect hwpx files properly, so we
+                # enable the extension in any case. See also:
+                # https://github.com/freedomofpress/dangerzone/pull/460#issuecomment-1654166465
                 "libreoffice_ext": "h2orestart.oxt",
             },
             # At least .doc, .docx, .odg, .odp, .odt, .pdf, .ppt, .pptx, .xls, and .xlsx