diff --git a/apps/planetarium/settings.js b/apps/planetarium/settings.js
index 0f716b33a..c82a7ca59 100644
--- a/apps/planetarium/settings.js
+++ b/apps/planetarium/settings.js
@@ -1,18 +1,22 @@
 // make sure to enclose the function in parentheses
 (function(back) {
     let settings = require('Storage').readJSON('planetarium.json',1)||{};
+    function save(key, value) {
+      settings[key] = value;
+      require('Storage').write('planetarium.json',settings);
+    }
     const appMenu = {
       '': {'title': 'Planetarium Settings'},
       '< Back': back,
       'Star names': {
-        value: !settings.starnames,
+        value: settings.starnames,
         format: v => v ? 'Yes' : 'No',
-        onchange: v => require('Storage').write('planetarium.json', {starnames: !v}),
+        onchange: (v) => {save('starnames', v)}
       },
       'Constellations': {
-        value: !settings.constellations,
+        value: settings.constellations,
         format: v => v ? 'Yes' : 'No',
-        onchange: v => require('Storage').write('planetarium.json', {constellations: !v}),
+        onchange: (v) => {save('constellations', v)}
       }   
     };
     E.showMenu(appMenu)