In a rare show of unity, SAG and AFTRA have announced jointly that they’ll support ACTRA should the Canadian actors union strike against the ad industry.

The Screen Actors Guild and the American Federation of Television and Radio Artists issued the statement of support Wednesday for the Alliance of Canadian Cinema, Television and Radio Artists. Move came a day after ACTRA announced it was seeking a strike authorization from its members.

“We believe that it is critical that the industry meets them halfway and ensures that ACTRA members receive just compensation for their creative performances and for their willingness to make modifications where appropriate,” the unions said. “In the event that ACTRA is forced to call a strike, SAG and AFTRA will take all actions legally possible to support striking ACTRA members, including instructing our members to refuse to accept any engagements from struck employers, particularly any attempts by those employers to relocate productions to the U.S. or other locations.”

ACTRA’s current deal expired June 30. A government mediator joined negotiations in July and talks will resume Sept. 25.

SAG and AFTRA have been at odds this year over the feature-primetime contract with AFTRA splitting from joint bargaining with SAG and then negotiating a primetime deal, which was ratified by members over SAG’s objections. The two unions agreed last month to a six-month extension of their commercials contract until March 31; they’ve informally agreed to joint negotiations on the ad pact but have not made that agreement official yet.