diff --git a/admin/syncdoc-type-hierarchy.el b/admin/syncdoc-type-hierarchy.el
index bfbbbc45aa4..56f2c30527e 100644
--- a/admin/syncdoc-type-hierarchy.el
+++ b/admin/syncdoc-type-hierarchy.el
@@ -35,6 +35,7 @@
 ;;; Code:
 
 (require 'cl-lib)
+(require 'org)
 
 (defconst syncdoc-file (or (macroexp-file-name) buffer-file-name))