diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index 26b807dde9..e0779ddaa4 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -414,8 +414,14 @@
   gEfiMdePkgTokenSpaceGuid.PcdMaximumGuidedExtractHandler|0x10
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxFvSupported|6
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPeimPerFv|32
+!if ($(FD_SIZE_IN_KB) == 1024) || ($(FD_SIZE_IN_KB) == 2048)
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize|0x2000
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxAuthVariableSize|0x2800
+!endif
+!if $(FD_SIZE_IN_KB) == 4096
+  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize|0x8400
+  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxAuthVariableSize|0x8400
+!endif
   gEfiMdeModulePkgTokenSpaceGuid.PcdVariableStoreSize|0xe000
 
   gEfiMdeModulePkgTokenSpaceGuid.PcdVpdBaseAddress|0x0
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 41f06a6b6a..bbe26e2cf4 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -419,8 +419,14 @@
   gEfiMdePkgTokenSpaceGuid.PcdMaximumGuidedExtractHandler|0x10
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxFvSupported|6
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPeimPerFv|32
+!if ($(FD_SIZE_IN_KB) == 1024) || ($(FD_SIZE_IN_KB) == 2048)
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize|0x2000
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxAuthVariableSize|0x2800
+!endif
+!if $(FD_SIZE_IN_KB) == 4096
+  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize|0x8400
+  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxAuthVariableSize|0x8400
+!endif
   gEfiMdeModulePkgTokenSpaceGuid.PcdVariableStoreSize|0xe000
 
   gEfiMdeModulePkgTokenSpaceGuid.PcdVpdBaseAddress|0x0
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index 053c84b685..ff795815f6 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -419,8 +419,14 @@
   gEfiMdePkgTokenSpaceGuid.PcdMaximumGuidedExtractHandler|0x10
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxFvSupported|6
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPeimPerFv|32
+!if ($(FD_SIZE_IN_KB) == 1024) || ($(FD_SIZE_IN_KB) == 2048)
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize|0x2000
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxAuthVariableSize|0x2800
+!endif
+!if $(FD_SIZE_IN_KB) == 4096
+  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize|0x8400
+  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxAuthVariableSize|0x8400
+!endif
   gEfiMdeModulePkgTokenSpaceGuid.PcdVariableStoreSize|0xe000
 
   gEfiMdeModulePkgTokenSpaceGuid.PcdVpdBaseAddress|0x0