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-rw-r--r--lisp/gnus/nnheader.el2
1 files changed, 2 insertions, 0 deletions
diff --git a/lisp/gnus/nnheader.el b/lisp/gnus/nnheader.el
index 5cc26cb07d9..45e030027a9 100644
--- a/lisp/gnus/nnheader.el
+++ b/lisp/gnus/nnheader.el
@@ -31,6 +31,8 @@
(eval-when-compile (require 'cl))
+(defvar nnmail-extra-headers)
+
;; Requiring `gnus-util' at compile time creates a circular
;; dependency between nnheader.el and gnus-util.el.
;;(eval-when-compile (require 'gnus-util))