UINT64 is defined as the different type for the different ARCHs. To let it work for all archs and compilers, add (unsigned long long) for the input value together with %llx. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao <liming.gao@intel.com> Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>