Anyone see this linker error when attempting OAD in BLE stack v1.3?

Hello,

I'm trying out OAD on the cc254x.  I've added FEATURE_OAD to the preprocessor defines.

I've also added /profiles/OAD to the library search path.

When building my app or the sensortag app, I see this error:

Linking

Fatal Error[e72]: Segment IMAGE_HEADER must be defined in a segment definition option (-Z, -b or -P)

Error while running Linker.

Did I miss a step?  I'm not sure where IMAGE_HEADER should be defined.

Is there a reference guide to OAD showing how to build for normal flash programming (with OAD enabled), and how to build an image for loading in over the air?

Thanks!

peter