1 files changed, 1 insertions, 1 deletions
diff --git a/MdeModulePkg/Library/NonDiscoverableDeviceRegistrationLib/NonDiscoverableDeviceRegistrationLib.c b/MdeModulePkg/Library/NonDiscoverableDeviceRegistrationLib/NonDiscoverableDeviceRegistrationLib.c
index 6f46dfac0f..536dfc7297 100644
--- a/MdeModulePkg/Library/NonDiscoverableDeviceRegistrationLib/NonDiscoverableDeviceRegistrationLib.c
+++ b/MdeModulePkg/Library/NonDiscoverableDeviceRegistrationLib/NonDiscoverableDeviceRegistrationLib.c
@@ -163,7 +163,7 @@ RegisterNonDiscoverableMmioDevice (
     Desc->AddrLen               = Size;
     Desc->AddrRangeMax          = Base + Size - 1;
     Desc->ResType               = ACPI_ADDRESS_SPACE_TYPE_MEM;
-    Desc->AddrSpaceGranularity  = (Base + Size > SIZE_4GB) ? 64 : 32;
+    Desc->AddrSpaceGranularity  = ((EFI_PHYSICAL_ADDRESS)Base + Size > SIZE_4GB) ? 64 : 32;
     Desc->AddrTranslationOffset = 0;
   }
   VA_END (Args);