diff --git a/MdePkg/Include/Guid/PcAnsi.h b/MdePkg/Include/Guid/PcAnsi.h
index afbfc73bab..ea7143a64f 100644
--- a/MdePkg/Include/Guid/PcAnsi.h
+++ b/MdePkg/Include/Guid/PcAnsi.h
@@ -47,7 +47,7 @@
   
 #define EFI_SAS_DEVICE_PATH_GUID \
   { \
-    0xb4dd87d4, 0x8b00, 0xd911, {0xaf, 0xdc, 0x00, 0x10, 0x83, 0xff, 0xca, 0x4d } \
+    0xd487ddb4, 0x008b, 0x11d9, {0xaf, 0xdc, 0x00, 0x10, 0x83, 0xff, 0xca, 0x4d } \
   }
 
 extern EFI_GUID gEfiPcAnsiGuid;