1 files changed, 3 insertions, 3 deletions
diff --git a/MdePkg/Include/Uefi/UefiSpec.h b/MdePkg/Include/Uefi/UefiSpec.h
index c2f52d2769..050a6ec27c 100644
--- a/MdePkg/Include/Uefi/UefiSpec.h
+++ b/MdePkg/Include/Uefi/UefiSpec.h
@@ -1538,14 +1538,14 @@ EFI_STATUS
 //
 // EFI Runtime Services Table
 //
-#define EFI_SYSTEM_TABLE_SIGNATURE      0x5453595320494249
+#define EFI_SYSTEM_TABLE_SIGNATURE      0x5453595320494249ULL
 #define EFI_SYSTEM_TABLE_REVISION       ((2<<16) | (10))
 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2<<16) | (10))
 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2<<16) | (00))
 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1<<16) | (10))
 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1<<16) | (02))
 
-#define EFI_RUNTIME_SERVICES_SIGNATURE  0x56524553544e5552
+#define EFI_RUNTIME_SERVICES_SIGNATURE  0x56524553544e5552ULL
 #define EFI_RUNTIME_SERVICES_REVISION   EFI_2_10_SYSTEM_TABLE_REVISION
 
 typedef struct {
@@ -1591,7 +1591,7 @@ typedef struct {
 } EFI_RUNTIME_SERVICES;
 
 
-#define EFI_BOOT_SERVICES_SIGNATURE   0x56524553544f4f42
+#define EFI_BOOT_SERVICES_SIGNATURE   0x56524553544f4f42ULL
 #define EFI_BOOT_SERVICES_REVISION    EFI_2_10_SYSTEM_TABLE_REVISION
 
 typedef struct {