diff --git a/lisp/textmodes/ispell.el b/lisp/textmodes/ispell.el

index 7167dc9..c8f2cd7 100644

--- a/lisp/textmodes/ispell.el

+++ b/lisp/textmodes/ispell.el

@@ -1177,7 +1177,7 @@ aspell is used along with Emacs).")

 		;; Unless default dict, re-add "-d" option with the mapped value

 		(if dict-name

 		    (if dict-equiv

-			(nconc ispell-args (list "-d" dict-equiv))

+			(setq ispell-args (nconc ispell-args (list "-d" dict-equiv)))

 		      (message

 		       "ispell-set-spellchecker-params: Missing hunspell equiv for \"%s\". Skipping."

 		       dict-name)