free command not working with -s flag

[alireza kaftoosian]

when i enter this command :
free -s 3
or and numbers for seconds , it returns me :
free: seconds argument `3' failed
but i have only this bug in version 3.3.10 and in 3.3.9 it worls normally and refresh free in entered seconds

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: procps 2:3.3.10-4ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2
Uname: Linux 4.4.0-8-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Mar 1 17:00:20 2016
InstallationDate: Installed on 2016-01-24 (36 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160123)
SourcePackage: procps
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Brian Murray (brian-murray)]

This is fixed in Zesty and later.

 procps | 2:3.3.12-1ubuntu2 | zesty | source, amd64, arm64, armhf, i386, ppc64el, s390x
 procps | 2:3.3.12-1ubuntu2 | artful | source, amd64, arm64, armhf, i386, ppc64el, s390x
 procps | 2:3.3.12-1ubuntu2 | bionic | source, amd64, arm64, armhf, i386, ppc64el, s390x