diff --git a/Features/ManageabilityPkg/Library/BaseManageabilityTransportHelperLib/BaseManageabilityTransportHelper.c b/Features/ManageabilityPkg/Library/BaseManageabilityTransportHelperLib/BaseManageabilityTransportHelper.c
index 27bc5eaddf2..e47d1c54525 100644
--- a/Features/ManageabilityPkg/Library/BaseManageabilityTransportHelperLib/BaseManageabilityTransportHelper.c
+++ b/Features/ManageabilityPkg/Library/BaseManageabilityTransportHelperLib/BaseManageabilityTransportHelper.c
@@ -19,6 +19,7 @@ MANAGEABILITY_SPECIFICATION_NAME  ManageabilitySpecNameTable[] = {
   { &gManageabilityTransportKcsGuid,         L"KCS"      },
   { &gManageabilityTransportSmbusI2cGuid,    L"SMBUS I2C"},
   { &gManageabilityTransportPciVdmGuid,      L"PCI VDM"  },
+  { &gManageabilityTransportSerialGuid,      L"SERIAL"   },
   { &gManageabilityTransportMctpGuid,        L"MCTP"     },
   { &gManageabilityProtocolIpmiGuid,         L"IPMI"     },
   { &gManageabilityProtocolMctpGuid,         L"MCTP"     },
diff --git a/Features/ManageabilityPkg/Library/BaseManageabilityTransportHelperLib/BaseManageabilityTransportHelper.inf b/Features/ManageabilityPkg/Library/BaseManageabilityTransportHelperLib/BaseManageabilityTransportHelper.inf
index 0936449fda5..c3c9dd6952f 100644
--- a/Features/ManageabilityPkg/Library/BaseManageabilityTransportHelperLib/BaseManageabilityTransportHelper.inf
+++ b/Features/ManageabilityPkg/Library/BaseManageabilityTransportHelperLib/BaseManageabilityTransportHelper.inf
@@ -36,6 +36,7 @@
   gManageabilityTransportKcsGuid
   gManageabilityTransportSmbusI2cGuid
   gManageabilityTransportPciVdmGuid
+  gManageabilityTransportSerialGuid
   gManageabilityTransportMctpGuid
   gManageabilityProtocolIpmiGuid
   gManageabilityProtocolMctpGuid
diff --git a/Features/ManageabilityPkg/ManageabilityPkg.dec b/Features/ManageabilityPkg/ManageabilityPkg.dec
index 203f1fedab2..e3d7455212f 100644
--- a/Features/ManageabilityPkg/ManageabilityPkg.dec
+++ b/Features/ManageabilityPkg/ManageabilityPkg.dec
@@ -49,6 +49,8 @@
   gManageabilityTransportPciVdmGuid   = { 0x388021A7, 0xFB59, 0x4811, { 0x9D, 0xA7, 0xD5, 0x63, 0x7D, 0x04, 0xA7, 0x2F } }
   # Manageability Transport MCTP
   gManageabilityTransportMctpGuid     = { 0x6798448D, 0x1200, 0x4577, { 0x82, 0x50, 0xA9, 0x83, 0xBA, 0x2B, 0x45, 0xD9 } }
+  # Manageability Transport SERIAL
+  gManageabilityTransportSerialGuid   = { 0xEF437878, 0x34DD, 0x4879, { 0x8F, 0xD3, 0xB6, 0x0A, 0x40, 0x3C, 0xD0, 0x63 } }
 
   # Manageability Protocol Specification
   #