diff --git a/jsonschema-core.xml b/jsonschema-core.xml
index 0181a388..85419398 100644
--- a/jsonschema-core.xml
+++ b/jsonschema-core.xml
@@ -355,8 +355,7 @@
                         <xref target="unrecognized" format="counter"></xref>.
                     </t>
                     <t>
-                        An empty schema is a JSON Schema with no properties, or only unknown
-                        properties.
+                        An empty schema is a JSON Schema with no properties.
                     </t>
                 </section>
                 <section title="Boolean JSON Schemas">