Removing Adwords Random Code

Does anyone know how to stop the random code from appearing from Adwords?

Example:

When someone clicks on my campaign it should show up as
mysite.com/test1/

Instead of shows up as
mysite.com/test1/?gclid=COOE55GnuaECFRRUgwodW1cI-w

Anyone know how to remove the random code it generates every time?

Edit: Found the answer, it's called "Auto Tagging"