diff --git a/configure.ng b/configure.ng
index 47c95990..c89096fd 100644
--- a/configure.ng
+++ b/configure.ng
@@ -518,7 +518,8 @@ if test "$x_ircplus_on" = "yes"; then
 	# CHARCONV is the only function depending on it.
 	x_iconv_on=no
 	AC_ARG_WITH(iconv,
-		[  --with-iconv            enable character conversation using libiconv],
+		AS_HELP_STRING([--with-iconv],
+			       [enable character conversation using libiconv]),
 		[ if test "$withval" != "no"; then
 			if test "$withval" != "yes"; then
 				CFLAGS="-I$withval/include $CFLAGS"