Code import help please

Hi I am new to C and am trying to convert some C code into the Keil dialect. Mostly successful, but have got really stuck on the following fragment. I get the error as shown. After hours of playing with variations I just can't work it out. Would some kind soul please assist - thanks!

typedef struct
{
  uint8 apiId;
  union
  {
    uint8 payload[ 100 ];
    XB_TX64 tx64;
    XB_TX16 tx16;
    XB_TXStatus txStatus;
    XB_RX64 rx64;
    XB_RX16 rx16;
    XB_ATCommand atCommand;
    XB_ATCommandResponse atResponse;
    XB_IO64 io64;
    XB_IO16 io16;
  };  /* "warning #40-D: expected an identifier" */
  uint8 crc;
  uint8 *dataPtr;
  int rxState;
  int length;
  int index;
 } __attribute((packed)) XBPacket;

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