diff --git a/miniupnpd/genconfig.sh b/miniupnpd/genconfig.sh
index 501bc76..94510d1 100755
--- a/miniupnpd/genconfig.sh
+++ b/miniupnpd/genconfig.sh
@@ -99,7 +99,11 @@ echo " * http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/" >> ${CONFIG
 echo " * (c) 2006-2016 Thomas Bernard" >> ${CONFIGFILE}
 echo " * generated by $0 on `date`" >> ${CONFIGFILE}
 echo " * `uname -a`" >> ${CONFIGFILE}
-echo " * using command line options $* */" >> ${CONFIGFILE}
+if [ -z "$*" ] ; then
+	echo " * using no command line option */" >> ${CONFIGFILE}
+else
+	echo " * using command line options $* */" >> ${CONFIGFILE}
+fi
 echo "#ifndef $CONFIGMACRO" >> ${CONFIGFILE}
 echo "#define $CONFIGMACRO" >> ${CONFIGFILE}
 echo "" >> ${CONFIGFILE}