diff --git a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostResource.h b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostResource.h
index f35222b634..8612c0c325 100644
--- a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostResource.h
+++ b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostResource.h
@@ -17,7 +17,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 #include <PiDxe.h>
 
-#define PCI_RESOURCE_LESS         0xFFFFFFFFFFFFFFFE
+#define PCI_RESOURCE_LESS         0xFFFFFFFFFFFFFFFEULL
 
 typedef enum {
   TypeIo    = 0,