diff --git a/README.md b/README.md
index 4a77afa..ba56f40 100644
--- a/README.md
+++ b/README.md
@@ -110,7 +110,7 @@ The file [cpdfxmlm.ml](cpdfxmlm.ml) was written by Daniel Bünzli.
 
 The file [cpdfyojson.ml](cpdfyojson.ml) was written by Martin Jambon and others.
 
-The error descriptions for -verify-pdfua "matterhorn1.1" come from the PDF
+The error descriptions for -verify "PDF/UA-1(matterhorn)" come from the PDF
 Association, and are licensed under the Creative Commons Attribution 4.0
 International license.