diff --git a/mu4e/mu4e-actions.el b/mu4e/mu4e-actions.el
index 3014e064..1b816790 100644
--- a/mu4e/mu4e-actions.el
+++ b/mu4e/mu4e-actions.el
@@ -213,7 +213,7 @@ store your org-contacts."
     (setq tagstr (replace-regexp-in-string "[\\/&]" "\\\\\\&" tagstr))
 
     ;; replaces keywords with sed, restricted to the header
-    (call-process "sed" nil nil nil "-ine"
+    (call-process "sed" nil nil nil "-i"
       (format "1,/^$/s/^%s:.*$/%s: %s/" header header tagstr) path)
 
     (mu4e-message (concat "tagging: " (mapconcat 'identity taglist " ")))