diff --git a/edk/Cper.h b/edk/Cper.h
index 7a3f510..3723f5f 100644
--- a/edk/Cper.h
+++ b/edk/Cper.h
@@ -328,7 +328,6 @@
   UINT64    InstructionIP;
 } EFI_PROCESSOR_GENERIC_ERROR_DATA;
 
-#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64)
 ///
 /// IA32 and x64 Specific definitions.
 ///
@@ -353,6 +352,11 @@
   { \
     0x48AB7F57, 0xDC34, 0x4f6c, {0xA7, 0xD3, 0xB0, 0xB5, 0xB0, 0xA7, 0x43, 0x14 } \
   }
+extern EFI_GUID   gEfiIa32x64ErrorTypeCacheCheckGuid;
+extern EFI_GUID   gEfiIa32x64ErrorTypeTlbCheckGuid;
+extern EFI_GUID   gEfiIa32x64ErrorTypeBusCheckGuid;
+extern EFI_GUID   gEfiIa32x64ErrorTypeMsCheckGuid;
+
 ///@}
 
 ///
@@ -735,8 +739,6 @@
   UINT64    Resv1           : 50;
 } EFI_IA32_X64_VALID_BITS;
 
-#endif
-
 ///
 /// Error Status Fields
 ///