--- configure.ac.orig	2020-02-09 18:44:01 UTC
+++ configure.ac
@@ -818,7 +818,7 @@ dnl not fail if we have no tools to generate it (so ad
 		AC_MSG_CHECKING([if we can build ${nut_doc_build_target_base}])
 		can_build_doc_man=no
 		if test "${nut_have_asciidoc}" = yes ; then
-			( cd "$DOCTESTDIR" && ${A2X} --format manpage --destination-dir=. --xsltproc-opts "--nonet" "${abs_srcdir}"/docs/man/snmp-ups.txt && test -s snmp-ups.8 ) && can_build_doc_man=yes
+			( cd "$DOCTESTDIR" && ${A2X} --format manpage --destination-dir=. --xsltproc-opts="--nonet" "${abs_srcdir}"/docs/man/snmp-ups.txt && test -s snmp-ups.8 ) && can_build_doc_man=yes
 			rm -f "${DOCTESTDIR}"/snmp-ups.8
 		fi
 		if test "${can_build_doc_man}" = yes ; then