diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec
index a694146689..0d42918427 100644
--- a/UefiCpuPkg/UefiCpuPkg.dec
+++ b/UefiCpuPkg/UefiCpuPkg.dec
@@ -182,6 +182,14 @@
   ## Specifies the size of the microcode Region.
   # @Prompt Microcode Region size.
   gUefiCpuPkgTokenSpaceGuid.PcdCpuMicrocodePatchRegionSize|0x0|UINT64|0x00000006
+  ## Specifies the AP wait loop state during POST phase.
+  #  The value is defined as below.<BR><BR>
+  #  1: Place AP in the Hlt-Loop state.<BR>
+  #  2: Place AP in the Mwait-Loop state.<BR>
+  #  3: Place AP in the Run-Loop state.<BR>
+  # @Prompt The AP wait loop state.
+  # @ValidRange  0x80000001 | 1 - 3
+  gUefiCpuPkgTokenSpaceGuid.PcdCpuApLoopMode|1|UINT8|0x60008006
 
 [PcdsDynamic, PcdsDynamicEx]
   ## Contains the pointer to a CPU S3 data buffer of structure ACPI_CPU_DATA.
diff --git a/UefiCpuPkg/UefiCpuPkg.uni b/UefiCpuPkg/UefiCpuPkg.uni
index fd1e81226a..2c74a92e06 100644
--- a/UefiCpuPkg/UefiCpuPkg.uni
+++ b/UefiCpuPkg/UefiCpuPkg.uni
@@ -139,3 +139,7 @@
 
 #string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuNumberOfReservedVariableMtrrs_HELP  #language en-US "Specifies the number of variable MTRRs reserved for OS use."
 
+#string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuApLoopMode_PROMPT  #language en-US "The AP wait loop state"
+
+#string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuApLoopMode_HELP  #language en-US "Specifies the AP wait loop state during POST phase."
+