diff --git a/gui/dialogs/gps.xml b/gui/dialogs/gps.xml
index ecfca5c14..0062c2c4b 100644
--- a/gui/dialogs/gps.xml
+++ b/gui/dialogs/gps.xml
@@ -73,7 +73,7 @@
       }
   
       
-      dlg.getNode("scratch-mag-bearing-deg", 1).setValue(cd[0] - magvar());
+      dlg.getNode("scratch-mag-bearing-deg", 1).setValue(geo.normdeg(cd[0] - magvar()));
       dlg.getNode("scratch-distance-nm", 1).setValue(cd[1]);
       
       gui.dialog_update("gps");