Tips for wearing Miraclesuit waist cincher

[Halfpint2017]

I bought a miracle suit waist cincher to wear under a dress for a wedding I’m going to. It really does work but there is a line visible down the front where it fastens, any tips on how to disguise this? I have a slip to wear over it but you can still see a faint line worried it will show in photos.
Thanks in advance!