A federal judge in Wisconsin dealt the first legal blow to President Donald Trump’s revised travel ban on Friday, barring enforcement of the policy to deny U.S. entry to the wife and child of a Syrian refugee already granted asylum in the United States.

The temporary restraining order, granted by U.S. District Judge William Conley in Madison, applies only to the family of the Syrian refugee, who brought the case anonymously to protect the identities of his wife and daughter, still living in the war-torn Syrian city of Aleppo.

But it represents the first of several challenges brought against Trump’s newly amended executive order, issued on March 6 and due to go into effect on March 16, to draw a court ruling in opposition to its enforcement.