How do I fix this 9patch/sprite problem?

Hi, how exactly do I remove that blurr as you can see on this picture: http://prntscr.com/bh871g I would like to make those 2 9patch objects..fit exactly on eachother but it's just seenable that its 2 different objects because the edges of the white line are a little bit blurish. Any help is appreciated..thank you!

Try leaving a one pixel transparent border around the outside edge of your 9 patch pieces and see if that helps.

thanks for the help. Unfortunately this doesnt change anything.