//\r
// Find Memory Descriptors that are less than 4GB, so the PPB Memory Window can be used for downstream devices\r
//\r
- if (Descriptors->AddrRangeMax < 0x100000000) {\r
+ if (Descriptors->AddrRangeMax < 0x100000000ULL) {\r
//\r
// Find the largest Non-Prefetchable Memory Descriptor that is less than 4GB\r
//\r