Optimised Duplication Between MSDP and VTL

NBU 7.5.0.7

Hi all, 

Just wondering about an SLP configuration... Backup runs to an MSDP then duplicated to and OST VTL.

Because the VTL is OST enabled, will it be an optimised duplication?

From what I've read in the dedup guide optimised dupes can only go from MSDP to MSDP. 

Just thought as it's and OST VTL I might be in luck..