Iran rejected a proposal to evenly divide control of the Strait of Hormuz, jeopardizing hopes that Tehran and Washington would quickly resume negotiations to end the war, The Wall Street Journal reports.

Oman, which sits opposite Iran across the strait, suggested a temporary plan to establish even lanes of control, but Tehran demanded Tuesday that it take the lion’s share of the waterway critical to the flow of the world’s oil supply, one of its top diplomats said.

Iranian Deputy Foreign Minister Kazem Gharibabadi told The Wall Street Journal that Tehran will not agree to the next round of talks with Washington unless Oman supports the proposal to transfer most of the control of the strait to Iran.

According to him, the Omani plan does not solve Iran’s security problems.

The inbound sea corridor should be completely under Iranian control, while part of the outbound transport corridor can remain under Oman’s control, Gharibabadi said.

If this proposal is accepted, they will move on to the next phase, the Iranian deputy foreign minister added.