diff --git a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.dsc b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.dsc
index 4bab6d62f0..16c355f8f8 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.dsc
+++ b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.dsc
@@ -114,9 +114,9 @@
   gArmPlatformTokenSpaceGuid.PcdCPUCorePrimaryStackSize|0x4000
   gArmPlatformTokenSpaceGuid.PcdCPUCoreSecondaryStackSize|0x1000
 
-  # System Memory (2GB)
+  # System Memory (2GB - 16MB of Trusted DRAM at the top of the 32bit address space)
   gArmTokenSpaceGuid.PcdSystemMemoryBase|0x80000000
-  gArmTokenSpaceGuid.PcdSystemMemorySize|0x80000000
+  gArmTokenSpaceGuid.PcdSystemMemorySize|0x7F000000
 
   # Size of the region used by UEFI in permanent memory (Reserved 64MB)
   gArmPlatformTokenSpaceGuid.PcdSystemMemoryUefiRegionSize|0x04000000