diff --git a/README.md b/README.md
index 9081542..4aa0c54 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ Recommand to use [doom-themes](https://github.com/hlissner/emacs-doom-themes);
 (setq doom-modeline-icon t)
 
 ;; Whether show the icon for major mode. It should respect `doom-modeline-icon'.
-(setq doom-modeline-major-mode-icon nil)
+(setq doom-modeline-major-mode-icon t)
 
 ;; Don’t compact font caches during GC.
 ;; If you are expereicing the laggy issue especially on Windows, please set to
diff --git a/doom-modeline.el b/doom-modeline.el
index de7a014..9904c59 100644
--- a/doom-modeline.el
+++ b/doom-modeline.el
@@ -96,7 +96,7 @@ Given ~/Projects/FOSS/emacs/lisp/comint.el
   "Whether show `all-the-icons' or not (if nil nothing will be showed).
 The icons may not be showed correctly on Windows. Disable to make it work.")
 
-(defvar doom-modeline-major-mode-icon nil
+(defvar doom-modeline-major-mode-icon t
   "Whether show the icon for major mode. It should respect `doom-modeline-icon'.")