C28x Codegen 6.1.0, MISRA 6.4 and bitfields

In my project I have the following bitfields defined:

struct DRR2_BITS {     // bits description
    Uint16    HWLB:8;            // 7:0    High word low byte
    Uint16    HWHB:8;            // 15:8    High word high byte
};

This is triggering MISRA 6.4 -

 (MISRA-C:2004 6.4/R) Bit fields shall only be defined to be of type unsigned int or signed int

Uint16 is defined as:

typedef unsigned int    Uint16;

Seems that this should satisfy the requirement.  Is this a bug or am I missing something?

-Lori