diff --git a/lib/pdffont.js b/lib/pdffont.js
index ade4b4a0..199dbe46 100644
--- a/lib/pdffont.js
+++ b/lib/pdffont.js
@@ -2,7 +2,7 @@ import nodeUtil from 'util';
 import PDFUnit from './pdfunit.js';
 import { kFontFaces, kFontStyles } from './pdfconst.js';
 
-const _boldSubNames = ['bd', 'bold', 'demi', 'black'];
+const _boldSubNames = ['bd', 'bold', 'demi', 'black', 'medi'];
 const _stdFonts = [
    'arial',
    'helvetica',