diff --git a/apps/astral/app.js b/apps/astral/app.js
index 1827e5fbd..1cb97ae80 100644
--- a/apps/astral/app.js
+++ b/apps/astral/app.js
@@ -831,8 +831,10 @@ Bangle.on('mag', function (m) {
     if (isNaN(m.heading))
         compass_heading = "--";
     else
-        compass_heading = Math.round(m.heading);
-
+        compass_heading = 360 - Math.round(m.heading);
+    g.setColor("#000000");
+    g.fillRect(100, 10, 140, 20);
+    g.setColor(display_colour);
     g.drawString("  " + (compass_heading) + " ", 130, 20, true /*clear background*/);
 });