diff --git a/doc/org.bluez.MediaTransport.rst b/doc/org.bluez.MediaTransport.rst
index 4838d69..78789bc 100644
--- a/doc/org.bluez.MediaTransport.rst
+++ b/doc/org.bluez.MediaTransport.rst
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Transport delay in 1/10 of millisecond, this property is only writeable
- when the transport was acquired by the sender.
+ when the transport corresponds to a sink endpoint and it was acquired by
+ the sender.
uint16 Volume [readwrite, optional]
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