diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h
index b5fe8fbce1..b4c8ab777e 100644
--- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h
+++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h
@@ -203,7 +203,7 @@ CPU_FEATURE_DEPENDENCE_TYPE
 DetectFeatureScope (
   IN CPU_FEATURES_ENTRY         *CpuFeature,
   IN BOOLEAN                    Before,
-  IN CHAR8                      *NextCpuFeatureMask
+  IN UINT8                      *NextCpuFeatureMask
   );
 
 /**
diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib.c b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib.c
index 9a66bc49ff..394695baf2 100644
--- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib.c
+++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib.c
@@ -125,7 +125,7 @@ CPU_FEATURE_DEPENDENCE_TYPE
 DetectFeatureScope (
   IN CPU_FEATURES_ENTRY         *CpuFeature,
   IN BOOLEAN                    Before,
-  IN CHAR8                      *NextCpuFeatureMask
+  IN UINT8                      *NextCpuFeatureMask
   )
 {
   //