diff --git a/ArmPkg/Drivers/CpuPei/CpuPei.c b/ArmPkg/Drivers/CpuPei/CpuPei.c
index d54f42acfc..e63519ff64 100644
--- a/ArmPkg/Drivers/CpuPei/CpuPei.c
+++ b/ArmPkg/Drivers/CpuPei/CpuPei.c
@@ -73,7 +73,7 @@ InitializeCpuPeim (
   ArmEnableBranchPrediction ();
 
   // Publish the CPU memory and io spaces sizes
-  BuildCpuHob (PcdGet8 (PcdPrePiCpuMemorySize), PcdGet8 (PcdPrePiCpuIoSize));
+  BuildCpuHob (ArmGetPhysicalAddressBits (), PcdGet8 (PcdPrePiCpuIoSize));
 
   // Only MP Core platform need to produce gArmMpCoreInfoPpiGuid
   Status = PeiServicesLocatePpi (&gArmMpCoreInfoPpiGuid, 0, NULL, (VOID**)&ArmMpCoreInfoPpi);
diff --git a/ArmPkg/Drivers/CpuPei/CpuPei.inf b/ArmPkg/Drivers/CpuPei/CpuPei.inf
index eafccd6009..dcea012fd8 100644
--- a/ArmPkg/Drivers/CpuPei/CpuPei.inf
+++ b/ArmPkg/Drivers/CpuPei/CpuPei.inf
@@ -50,7 +50,6 @@
   gArmMpCoreInfoGuid
 
 [FixedPcd]
-  gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize
   gEmbeddedTokenSpaceGuid.PcdPrePiCpuIoSize
 
 [Depex]