diff --git a/NetworkPkg/NetworkPkg.dec b/NetworkPkg/NetworkPkg.dec
index c39e7d692e..944b1d1501 100644
--- a/NetworkPkg/NetworkPkg.dec
+++ b/NetworkPkg/NetworkPkg.dec
@@ -102,6 +102,13 @@
   # @Prompt PXE TFTP windowsize.
   gEfiNetworkPkgTokenSpaceGuid.PcdPxeTftpWindowSize|0x4|UINT64|0x10000008
 
+
+  ## This setting can override the default TFTP block size. A value of 0 computes
+  # the default from MTU information. A non-zero value will be used as block size
+  # in bytes.
+  # @Prompt TFTP block size.
+  gEfiNetworkPkgTokenSpaceGuid.PcdTftpBlockSize|0x0|UINT64|0x1000000B
+
 [PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
   ## IPv6 DHCP Unique Identifier (DUID) Type configuration (From RFCs 3315 and 6355).
   # 01 = DUID Based on Link-layer Address Plus Time [DUID-LLT]
diff --git a/NetworkPkg/NetworkPkg.uni b/NetworkPkg/NetworkPkg.uni
index ab9b4d21d3..19e57a4a60 100644
--- a/NetworkPkg/NetworkPkg.uni
+++ b/NetworkPkg/NetworkPkg.uni
@@ -92,3 +92,9 @@
 #string STR_gEfiNetworkPkgTokenSpaceGuid_PcdIPv6PXESupport_HELP  #language en-US "Indicates IPV6 PXE Function is enabled or not.\n"
                                                                                  "A value of 0 indicates the IPV6 PXE Function is disabled.\n"
                                                                                  "A value of 1 indicates the IPV6 PXE Function is enabled."
+
+#string STR_gEfiNetworkPkgTokenSpaceGuid_PcdTftpBlockSize_PROMPT  #language en-US "TFTP block size"
+
+#string STR_gEfiNetworkPkgTokenSpaceGuid_PcdTftpBlockSize_HELP  #language en-US "This setting can override the default TFTP block size. A value of 0 computes "
+                                                                                  "the default from MTU information. A non-zero value will be used as block size "
+                                                                                  "in bytes."