diff --git a/bin/sh/tests/parameters/Makefile b/bin/sh/tests/parameters/Makefile
index d49649226e6..528697df437 100644
--- a/bin/sh/tests/parameters/Makefile
+++ b/bin/sh/tests/parameters/Makefile
@@ -21,6 +21,7 @@ FILES+=		positional5.0
 FILES+=		positional6.0
 FILES+=		positional7.0
 FILES+=		positional8.0
+FILES+=		positional9.0
 FILES+=		pwd1.0
 FILES+=		pwd2.0
 
diff --git a/bin/sh/tests/parameters/positional9.0 b/bin/sh/tests/parameters/positional9.0
new file mode 100644
index 00000000000..8571bfaf613
--- /dev/null
+++ b/bin/sh/tests/parameters/positional9.0
@@ -0,0 +1,18 @@
+# $FreeBSD$
+# Although POSIX leaves the result of expanding ${#@} and ${#*} unspecified,
+# make sure it is at least numeric.
+
+set -- bb cc ddd
+set -f
+lengths=${#*}${#@}"${#*}${#@}"$(echo ${#*}${#@}"${#*}${#@}")
+IFS=
+lengths=$lengths${#*}${#@}"${#*}${#@}"$(echo ${#*}${#@}"${#*}${#@}")
+case $lengths in
+*[!0-9]*)
+	printf 'bad: %s\n' "$lengths"
+	exit 3 ;;
+????????????????*) ;;
+*)
+	printf 'too short: %s\n' "$lengths"
+	exit 3 ;;
+esac