The official stressed that he believed the voices of the Kurds will be hard to ignore once this process starts.
"The Kurds are an important relevant community. Syrian Kurds will have to have a righteous saying in what will be the future constitution, or changes of the current constitution," de Mistura said.
"At the moment, we are having technical talks about schedule and process rather than the actual constitution. When the time comes, it will be very difficult to ignore the voice of the Kurdish Syrian community," he added.
The United Nations has hosted two sets of technical talks on the constitution with the various Syrian opposition groups, in Lausanne, in recent weeks, Western diplomats say.
The Syrian opposition High Negotiations Committee has a Kurdish representative in the delegation, the UN special envoy noted.
"We will cross the bridge when actually the constitution will become a drafting element among Syrians. It is safe to say that when the Syrians start working among them regarding the future constitution, all parts and components of Syria will be and will have to be included," de Mistura said.
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