Tilde (~) and plus-minus (±) in wrong place on keyboard

I'm using a MacBook Pro with a Swedish physical keyboard but with a U.S. layout defined in System Preferences. However, the tilde (~) and plus-minus (±) keys seem switched. The following key combination should produce a ~: ![Screenshot of a Swedish keyboard with U.S. layout ][1] Because the mapping in System Preferences says so: ![Screenshot of the Keyboard Preferences pane showing the Input Sources tab ][2] But it results in a ± symbol. It seems these two keys (± and ~) are switched somehow. How do I make them work as shown in System Preferences?