diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/CpuCommonFeatures.h b/UefiCpuPkg/Library/CpuCommonFeaturesLib/CpuCommonFeatures.h
index c03e5ab018..c5bc62b207 100644
--- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/CpuCommonFeatures.h
+++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/CpuCommonFeatures.h
@@ -866,8 +866,8 @@ FeatureControlGetConfigData (
                                CPU_FEATURE_GET_CONFIG_DATA was not provided in
                                RegisterCpuFeature().
 
-  @retval TRUE     Enhanced Intel SpeedStep feature is supported.
-  @retval FALSE    Enhanced Intel SpeedStep feature is not supported.
+  @retval TRUE     Protected Processor Inventory Number feature is supported.
+  @retval FALSE    Protected Processor Inventory Number feature is not supported.
 
   @note This service could be called by BSP/APs.
 **/
diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Ppin.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Ppin.c
index 146c4cfda3..9ac97ab70d 100644
--- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Ppin.c
+++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Ppin.c
@@ -26,8 +26,8 @@
                                CPU_FEATURE_GET_CONFIG_DATA was not provided in
                                RegisterCpuFeature().
 
-  @retval TRUE     Enhanced Intel SpeedStep feature is supported.
-  @retval FALSE    Enhanced Intel SpeedStep feature is not supported.
+  @retval TRUE     Protected Processor Inventory Number feature is supported.
+  @retval FALSE    Protected Processor Inventory Number feature is not supported.
 
   @note This service could be called by BSP/APs.
 **/