screen changes terminal width on launch with TERM=xterm-256color

Description: Ubuntu 14.04 LTS
GNU bash, version 4.3.8(1)-release (x86_64-pc-linux-gnu)
Screen version 4.01.00devel (GNU) 2-May-06

Screen changes terminal width on launch. I was using default configurations of screen. (no .screenrc in home directory)

steps

1. Change the terminal width to other than 80.
2. Type "export TERM=xterm-256color" in the shell.
3. Type "screen".
4. now it changes the terminal width to 80.

I have found that changing a line in /etc/screenrc helps. (no more resizing on screen launch)

termcapinfo xterm 'is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l'
to
termcapinfo xterm* 'is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l'