Error in /usr/src/sbin/setkey

[Unga]

Hi all

I made a separate make in /usr/src/sbin, I get a error in /usr/src/sbin/setkey as follows:
===> setkey (all)
yacc -d /usr/src/sbin/setkey/parse.y
cp y.tab.c parse.c
cc -O2 -fno-strict-aliasing -pipe  -I/usr/src/sbin/setkey -I/usr/src/sbin/setkey
/../../lib/libipsec -I/usr/src/sbin/setkey/../../lib/libipsec -I/usr/src/sbin/se
tkey/../../sys/netipsec -DIPSEC_DEBUG -DYY_NO_UNPUT -DINET6 -I. -Wsystem-headers
 -Wno-pointer-sign -c /usr/src/sbin/setkey/setkey.c
cc -O2 -fno-strict-aliasing -pipe  -I/usr/src/sbin/setkey -I/usr/src/sbin/setkey
/../../lib/libipsec -I/usr/src/sbin/setkey/../../lib/libipsec -I/usr/src/sbin/se
tkey/../../sys/netipsec -DIPSEC_DEBUG -DYY_NO_UNPUT -DINET6 -I. -Wsystem-headers
 -Wno-pointer-sign -c parse.c
lex -t  /usr/src/sbin/setkey/token.l > token.c
cc -O2 -fno-strict-aliasing -pipe  -I/usr/src/sbin/setkey -I/usr/src/sbin/setkey
/../../lib/libipsec -I/usr/src/sbin/setkey/../../lib/libipsec -I/usr/src/sbin/se
tkey/../../sys/netipsec -DIPSEC_DEBUG -DYY_NO_UNPUT -DINET6 -I. -Wsystem-headers
 -Wno-pointer-sign -c token.c
/usr/src/sbin/setkey/token.l: In function 'yylex':
/usr/src/sbin/setkey/token.l:226: error: lvalue required as increment operand
*** Error code 1

Stop in /usr/src/sbin/setkey.
*** Error code 1

Stop in /usr/src/sbin.


Appreciate your replies to identify the cause.

Kind regards
Unga