diff --git a/usr.bin/xargs/tests/Makefile b/usr.bin/xargs/tests/Makefile
--- a/usr.bin/xargs/tests/Makefile
+++ b/usr.bin/xargs/tests/Makefile
@@ -15,6 +15,7 @@
 ${PACKAGE}FILES+=		regress.L.out
 ${PACKAGE}FILES+=		regress.P1.out
 ${PACKAGE}FILES+=		regress.R.out
+${PACKAGE}FILES+=		regress.R-1.out
 ${PACKAGE}FILES+=		regress.in
 ${PACKAGE}FILES+=		regress.n1.out
 ${PACKAGE}FILES+=		regress.n2.out
diff --git a/usr.bin/xargs/tests/regress.R-1.out b/usr.bin/xargs/tests/regress.R-1.out
new file mode 100644
--- /dev/null
+++ b/usr.bin/xargs/tests/regress.R-1.out
@@ -0,0 +1,4 @@
+The quick brown quick brown quick brown quick brownquick brown quick brown quick brown
+The fox jumped fox jumped fox jumped fox jumpedfox jumped fox jumped fox jumped
+The over the lazy over the lazy over the lazy over the lazyover the lazy over the lazy over the lazy
+The dog dog dog dogdog dog dog
diff --git a/usr.bin/xargs/tests/regress.sh b/usr.bin/xargs/tests/regress.sh
--- a/usr.bin/xargs/tests/regress.sh
+++ b/usr.bin/xargs/tests/regress.sh
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-echo 1..20
+echo 1..21
 
 REGRESSION_START($1)
 
@@ -10,6 +10,7 @@
 REGRESSION_TEST(`L', `xargs -L3 echo <${SRCDIR}/regress.in')
 REGRESSION_TEST(`P1', `xargs -P1 echo <${SRCDIR}/regress.in')
 REGRESSION_TEST(`R', `xargs -I% -R1 echo The % % % %% % % <${SRCDIR}/regress.in')
+REGRESSION_TEST(`R-1', `xargs -I% -R-1 echo The % % % %% % % <${SRCDIR}/regress.in')
 REGRESSION_TEST(`n1', `xargs -n1 echo <${SRCDIR}/regress.in')
 REGRESSION_TEST(`n2', `xargs -n2 echo <${SRCDIR}/regress.in')
 REGRESSION_TEST(`n2P0',`xargs -n2 -P0 echo <${SRCDIR}/regress.in | sort')
diff --git a/usr.bin/xargs/xargs.c b/usr.bin/xargs/xargs.c
--- a/usr.bin/xargs/xargs.c
+++ b/usr.bin/xargs/xargs.c
@@ -200,7 +200,7 @@
 			pflag = 1;
 			break;
 		case 'R':
-			Rflag = (int)strtonum(optarg, 0, INT_MAX, &errstr);
+			Rflag = (int)strtonum(optarg, INT_MIN, INT_MAX, &errstr);
 			if (errstr)
 				errx(1, "-%c %s: %s", ch, optarg, errstr);
 			break;