diff --git a/UefiCpuPkg/UefiCpuPkg.uni b/UefiCpuPkg/UefiCpuPkg.uni
index b132ce62cf..6a6890d074 100644
--- a/UefiCpuPkg/UefiCpuPkg.uni
+++ b/UefiCpuPkg/UefiCpuPkg.uni
@@ -114,6 +114,10 @@
 
 #string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuSmmStackSize_HELP  #language en-US "Specifies stack size in bytes for each processor in SMM."
 
+#string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuSmmShadowStackSize_PROMPT   #language en-US "Processor shadow stack size in SMM."
+
+#string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuSmmShadowStackSize_HELP   #language en-US "Specifies shadow stack size in bytes for each processor in SMM."
+
 #string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuSmmApSyncTimeout_PROMPT  #language en-US "AP synchronization timeout value in SMM"
 
 #string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuSmmApSyncTimeout_HELP  #language en-US "Specifies timeout value in microseconds for the BSP in SMM to wait for all APs to come into SMM."