diff --git a/lib/launch-mode-view.coffee b/lib/launch-mode-view.coffee
index 2611ca4..ce13e81 100644
--- a/lib/launch-mode-view.coffee
+++ b/lib/launch-mode-view.coffee
@@ -2,7 +2,7 @@ module.exports =
 class LaunchModeView
   constructor: ({safeMode, devMode}={}) ->
     @element = document.createElement('status-bar-launch-mode')
-    @element.classList.add('inline-block', 'icon', 'icon-color-mode')
+    @element.classList.add('inline-block', 'icon', 'icon-color-mode', 'is-read-only')
     if devMode
       @element.classList.add('text-error')
       @tooltipDisposable = atom.tooltips.add(@element, title: 'This window is in dev mode')