diff --git a/ArmPlatformPkg/PrePi/PeiMPCore.inf b/ArmPlatformPkg/PrePi/PeiMPCore.inf
index 242b031755..7e2ad6fc48 100644
--- a/ArmPlatformPkg/PrePi/PeiMPCore.inf
+++ b/ArmPlatformPkg/PrePi/PeiMPCore.inf
@@ -97,7 +97,6 @@
 
   gArmPlatformTokenSpaceGuid.PcdCoreCount
 
-  gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize
   gEmbeddedTokenSpaceGuid.PcdPrePiCpuIoSize
 
   gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiACPIReclaimMemory
diff --git a/ArmPlatformPkg/PrePi/PeiUniCore.inf b/ArmPlatformPkg/PrePi/PeiUniCore.inf
index a45cdef4ed..26328b7e8f 100644
--- a/ArmPlatformPkg/PrePi/PeiUniCore.inf
+++ b/ArmPlatformPkg/PrePi/PeiUniCore.inf
@@ -90,7 +90,6 @@
 
   gArmPlatformTokenSpaceGuid.PcdCoreCount
 
-  gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize
   gEmbeddedTokenSpaceGuid.PcdPrePiCpuIoSize
 
   gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiACPIReclaimMemory
diff --git a/ArmPlatformPkg/PrePi/PrePi.c b/ArmPlatformPkg/PrePi/PrePi.c
index 02cff7ddc2..245bdded1e 100644
--- a/ArmPlatformPkg/PrePi/PrePi.c
+++ b/ArmPlatformPkg/PrePi/PrePi.c
@@ -115,7 +115,7 @@ PrePiMain (
   BuildStackHob (StacksBase, StacksSize);
 
   //TODO: Call CpuPei as a library
-  BuildCpuHob (PcdGet8 (PcdPrePiCpuMemorySize), PcdGet8 (PcdPrePiCpuIoSize));
+  BuildCpuHob (ArmGetPhysicalAddressBits (), PcdGet8 (PcdPrePiCpuIoSize));
 
   if (ArmIsMpCore ()) {
     // Only MP Core platform need to produce gArmMpCoreInfoPpiGuid