diff --git a/MdePkg/Include/IndustryStandard/SmBios.h b/MdePkg/Include/IndustryStandard/SmBios.h
index c495c48f3b..1ee0164567 100644
--- a/MdePkg/Include/IndustryStandard/SmBios.h
+++ b/MdePkg/Include/IndustryStandard/SmBios.h
@@ -862,17 +862,17 @@ typedef struct {
 } PROCESSOR_FEATURE_FLAGS;
 
 typedef struct {
-  UINT32  ProcessorReserved1             :1;
-  UINT32  ProcessorUnknown               :1;
-  UINT32  Processor64BitCapble           :1;
-  UINT32  ProcessorMultiCore             :1;
-  UINT32  ProcessorHardwareThread        :1;
-  UINT32  ProcessorExecuteProtection     :1;
-  UINT32  ProcessorEnhancedVirtulization :1;
-  UINT32  ProcessorPowerPerformanceCtrl  :1;
-  UINT32  Processor128bitCapble          :1;
-  UINT32  ProcessorArm64SocId            :1;
-  UINT32  ProcessorReserved2             :6;
+  UINT16  ProcessorReserved1             :1;
+  UINT16  ProcessorUnknown               :1;
+  UINT16  Processor64BitCapble           :1;
+  UINT16  ProcessorMultiCore             :1;
+  UINT16  ProcessorHardwareThread        :1;
+  UINT16  ProcessorExecuteProtection     :1;
+  UINT16  ProcessorEnhancedVirtulization :1;
+  UINT16  ProcessorPowerPerformanceCtrl  :1;
+  UINT16  Processor128bitCapble          :1;
+  UINT16  ProcessorArm64SocId            :1;
+  UINT16  ProcessorReserved2             :6;
 } PROCESSOR_CHARACTERISTIC_FLAGS;
 
 typedef struct {