diff --git a/tests/test_pdf.py b/tests/test_pdf.py
index 6e93040c6d..e3067b6fe9 100644
--- a/tests/test_pdf.py
+++ b/tests/test_pdf.py
@@ -620,6 +620,21 @@ def test_attachments_data():
     ''').write_pdf()
     md5 = '<{}>'.format(hashlib.md5(b'some data').hexdigest()).encode()
     assert md5 in pdf
+    assert b'EmbeddedFiles' in pdf
+
+
+@assert_no_logs
+def test_attachments_data_with_anchor():
+    pdf = FakeHTML(string='''
+      <title>Test document 2</title>
+      <meta charset="utf-8">
+      <link rel="attachment" href="data:,some data">
+      <h1 id="title">Title</h1>
+      <a href="#title">example</a>
+    ''').write_pdf()
+    md5 = '<{}>'.format(hashlib.md5(b'some data').hexdigest()).encode()
+    assert md5 in pdf
+    assert b'EmbeddedFiles' in pdf
 
 
 @assert_no_logs
diff --git a/weasyprint/pdf/__init__.py b/weasyprint/pdf/__init__.py
index 4c396dcbe2..34ae7e8aa7 100644
--- a/weasyprint/pdf/__init__.py
+++ b/weasyprint/pdf/__init__.py
@@ -468,7 +468,10 @@ def generate_pdf(document, target, zoom, attachments, optimize_size,
             name_array.append(pydyf.String(anchor[0]))
             name_array.append(anchor[1])
         dests = pydyf.Dictionary({'Names': name_array})
-        pdf.catalog['Names'] = pydyf.Dictionary({'Dests': dests})
+        if 'Names' in pdf.catalog:
+            pdf.catalog['Names']['Dests'] = dests
+        else:
+            pdf.catalog['Names'] = pydyf.Dictionary({'Dests': dests})
 
     # Apply PDF variants functions
     if variant: