diff --git a/UefiCpuPkg/Include/Library/RegisterCpuFeaturesLib.h b/UefiCpuPkg/Include/Library/RegisterCpuFeaturesLib.h
index 4aa3529eb7..10286ed167 100644
--- a/UefiCpuPkg/Include/Library/RegisterCpuFeaturesLib.h
+++ b/UefiCpuPkg/Include/Library/RegisterCpuFeaturesLib.h
@@ -70,6 +70,7 @@
 #define CPU_FEATURE_THREE_STRICK_COUNTER            (32+8)
 #define CPU_FEATURE_APIC_TPR_UPDATE_MESSAGE         (32+9)
 #define CPU_FEATURE_ENERGY_PERFORMANCE_BIAS         (32+10)
+#define CPU_FEATURE_PPIN                            (32+11)
 
 #define CPU_FEATURE_BEFORE_ALL                      BIT27
 #define CPU_FEATURE_AFTER_ALL                       BIT28