diff --git a/doom-modeline.el b/doom-modeline.el
index bb31233..cf0db07 100644
--- a/doom-modeline.el
+++ b/doom-modeline.el
@@ -83,7 +83,9 @@
 ;;
 
 (defvar doom-modeline-height (let ((font (face-font 'mode-line)))
-                               (if font (* 2 (aref (font-info font) 2)) 25))
+                               (if (and font (fboundp 'font-info))
+                                   (* 2 (aref (font-info font) 2))
+                                 25))
   "How tall the mode-line should be (only respected in GUI Emacs).")
 
 (defvar doom-modeline-bar-width 3
diff --git a/test/test-helper.el b/test/test-helper.el
index 586228f..a36041e 100644
--- a/test/test-helper.el
+++ b/test/test-helper.el
@@ -35,8 +35,6 @@
   (set-text-properties 0 (length txt) nil txt)
   txt)
 
-(defvar doom-modeline-height 26)
-
 (require 'doom-modeline (expand-file-name "doom-modeline.el"))
 
 ;;; test-helper.el ends here