diff --git a/lisp/edmacro.el b/lisp/edmacro.el
index debd76c43ad..c681f901411 100644
--- a/lisp/edmacro.el
+++ b/lisp/edmacro.el
@@ -62,6 +62,7 @@
 ;;; Code:
 
 (require 'cl-lib)
+(require 'seq)
 (require 'kmacro)
 
 ;;; The user-level commands for editing macros.