diff --git a/lisp/international/mule-conf.el b/lisp/international/mule-conf.el
index 43fbf2ba800..cb9cf974fea 100644
--- a/lisp/international/mule-conf.el
+++ b/lisp/international/mule-conf.el
@@ -1259,7 +1259,7 @@ is treated as a character."
   :charset-list '(unicode)
   :mime-charset 'utf-8)
 
-(define-coding-system 'utf-8-sig
+(define-coding-system 'utf-8-with-signature
   "UTF-8 (with signature (BOM))"
   :coding-type 'utf-8
   :mnemonic ?U
@@ -1271,7 +1271,7 @@ is treated as a character."
   :coding-type 'utf-8
   :mnemonic ?U
   :charset-list '(unicode)
-  :bom '(utf-8-sig . utf-8))
+  :bom '(utf-8-with-signature . utf-8))
 
 (define-coding-system-alias 'mule-utf-8 'utf-8)