diff --git a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c
index 67cf7504ab..1c944fab82 100644
--- a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c
+++ b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c
@@ -25,13 +25,11 @@
 // Per UEFI spec, only these control bits are allowed to be set.
 //
 STATIC CONST UINT32  mAllowedControlBits =
-  EFI_SERIAL_CLEAR_TO_SEND |
-  EFI_SERIAL_DATA_SET_READY |
-  EFI_SERIAL_RING_INDICATE |
-  EFI_SERIAL_CARRIER_DETECT |
+  EFI_SERIAL_REQUEST_TO_SEND |
+  EFI_SERIAL_DATA_TERMINAL_READY |
+  EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE |
   EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE |
-  EFI_SERIAL_OUTPUT_BUFFER_EMPTY |
-  EFI_SERIAL_INPUT_BUFFER_EMPTY;
+  EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;
 
 //
 // platform-specific bits that are not supported by this device.