diff --git a/lisp/mail/rmailsum.el b/lisp/mail/rmailsum.el
index 692f67b87d2..667b72b1b34 100644
--- a/lisp/mail/rmailsum.el
+++ b/lisp/mail/rmailsum.el
@@ -1692,7 +1692,7 @@ Deleted messages are skipped and don't count.
 When called from Lisp code, N may be omitted and defaults to 1.
 
 This command always outputs the complete message header,
-even the header display is currently pruned."
+even if the header display is currently pruned."
   (interactive
    (progn (require 'rmailout)
 	  (list (rmail-output-read-file-name)