diff --git a/CorebootPayloadPkg/CorebootPayloadPkgIa32.dsc b/CorebootPayloadPkg/CorebootPayloadPkgIa32.dsc
index 907e952022..06e9b319dd 100644
--- a/CorebootPayloadPkg/CorebootPayloadPkgIa32.dsc
+++ b/CorebootPayloadPkg/CorebootPayloadPkgIa32.dsc
@@ -67,10 +67,10 @@
   #    UINT8   Reserved[2];
   #  } PCI_SERIAL_PARAMETER;
   #
-  # Vendor 0000 Device 0000 Prog Interface 1, BAR #0, Offset 0, Stride = 1, Clock 1843200 (0x1c2000)
+  # Vendor FFFF Device 0000 Prog Interface 1, BAR #0, Offset 0, Stride = 1, Clock 1843200 (0x1c2000)
   #
   #                                           [Vendor]   [Device]  [----ClockRate---]  [------------Offset-----------] [Bar] [Stride] [RxFifo] [TxFifo]   [Rsvd]   [Vendor]
-  DEFINE PCI_SERIAL_PARAMETERS            = {0x00,0x00, 0x00,0x00, 0x0,0x20,0x1c,0x00, 0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x00,    0x01, 0x0,0x0, 0x0,0x0, 0x0,0x0, 0xff,0xff}
+  DEFINE PCI_SERIAL_PARAMETERS            = {0xff,0xff, 0x00,0x00, 0x0,0x20,0x1c,0x00, 0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x00,    0x01, 0x0,0x0, 0x0,0x0, 0x0,0x0, 0xff,0xff}
 
   #
   # Shell options: [BUILD_SHELL, FULL_BIN, MIN_BIN, NONE, UEFI]
diff --git a/CorebootPayloadPkg/CorebootPayloadPkgIa32X64.dsc b/CorebootPayloadPkg/CorebootPayloadPkgIa32X64.dsc
index 90a484d55c..286d886d62 100644
--- a/CorebootPayloadPkg/CorebootPayloadPkgIa32X64.dsc
+++ b/CorebootPayloadPkg/CorebootPayloadPkgIa32X64.dsc
@@ -67,10 +67,10 @@
   #    UINT8   Reserved[2];
   #  } PCI_SERIAL_PARAMETER;
   #
-  # Vendor 0000 Device 0000 Prog Interface 1, BAR #0, Offset 0, Stride = 1, Clock 1843200 (0x1c2000)
+  # Vendor FFFF Device 0000 Prog Interface 1, BAR #0, Offset 0, Stride = 1, Clock 1843200 (0x1c2000)
   #
   #                                           [Vendor]   [Device]  [----ClockRate---]  [------------Offset-----------] [Bar] [Stride] [RxFifo] [TxFifo]   [Rsvd]   [Vendor]
-  DEFINE PCI_SERIAL_PARAMETERS            = {0x00,0x00, 0x00,0x00, 0x0,0x20,0x1c,0x00, 0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x00,    0x01, 0x0,0x0, 0x0,0x0, 0x0,0x0, 0xff,0xff}
+  DEFINE PCI_SERIAL_PARAMETERS            = {0xff,0xff, 0x00,0x00, 0x0,0x20,0x1c,0x00, 0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x00,    0x01, 0x0,0x0, 0x0,0x0, 0x0,0x0, 0xff,0xff}
 
   #
   # Shell options: [BUILD_SHELL, FULL_BIN, MIN_BIN, NONE, UEFI]