The U.S. and South Korea have agreed to use the phrase “denuclearization of North Korea” in public statements, rather than Pyongyang’s preferred formulation of “denuclearization of the Korean Peninsula,” according to Seoul.

The decision could pose a stumbling block if the Trump administration pushes to restart negotiations with the DPRK, which could view the move as evidence of Washington’s “hostile policy” and unwillingness to meet its security demands.

Lee Jae-woong, spokesperson for South Korea’s Ministry of Foreign Affairs (MOFA), said on Thursday that “both ‘North Korean denuclearization’ and ‘Korean Peninsula denuclearization’ refer to the denuclearization of North Korea” in