Depreciation Start Date for Assets acquired on or before the 15th of a month

Hi,

The scenario I am facing is that when an asset is acquired before or on the 15th; the depreciation start date should be the start of the period. I tried playing with the period control but in my case the depreciation start date from SAP always starts from the mid month when I am using a straight line method? Any suggestions on what I could potentially do? Manually changing the depreciation date is not an option.

Specific example: Asset acquired on 15th June, 2015, then the depreciation start date should be June 1, 2015.