diff --git a/src/lib/dns/cpp/name.h b/src/lib/dns/cpp/name.h
index f0b4794520..06ad79a81e 100644
--- a/src/lib/dns/cpp/name.h
+++ b/src/lib/dns/cpp/name.h
@@ -330,6 +330,7 @@ public:
     /// <code>buffer.getCapacity() - buffer.getLength() >= Name::MAX_WIRE</code>
     /// then this method should not throw an exception.
     ///
+    /// \param buffer An output buffer to store the wire data.
     void toWire(OutputBuffer& buffer) const;
     //@}