diff --git a/src/calibre/ebooks/docx/writer/links.py b/src/calibre/ebooks/docx/writer/links.py
index f2e1a27fb2..6293be50c5 100644
--- a/src/calibre/ebooks/docx/writer/links.py
+++ b/src/calibre/ebooks/docx/writer/links.py
@@ -60,7 +60,7 @@ class TOCItem(object):
 
 def sanitize_bookmark_name(base):
     # Max length allowed by Word appears to be 40, we use 32 to leave some
-    # space for making the name non-unique
+    # space for making the name unique
     return re.sub(r'[^0-9a-zA-Z]', '_', ascii_text(base))[:32].rstrip('_')