diff --git a/types/xdg_shell/wlr_xdg_positioner.c b/types/xdg_shell/wlr_xdg_positioner.c
index f88bf323..a4cb9e31 100644
--- a/types/xdg_shell/wlr_xdg_positioner.c
+++ b/types/xdg_shell/wlr_xdg_positioner.c
@@ -281,6 +281,8 @@ static enum xdg_positioner_anchor positioner_anchor_invert_y(
 		return XDG_POSITIONER_ANCHOR_BOTTOM_LEFT;
 	case XDG_POSITIONER_ANCHOR_BOTTOM_LEFT:
 		return XDG_POSITIONER_ANCHOR_TOP_LEFT;
+	case XDG_POSITIONER_ANCHOR_TOP_RIGHT:
+		return XDG_POSITIONER_ANCHOR_BOTTOM_RIGHT;
 	case XDG_POSITIONER_ANCHOR_BOTTOM_RIGHT:
 		return XDG_POSITIONER_ANCHOR_TOP_RIGHT;
 	default: