diff --git a/MdeModulePkg/Universal/SerialDxe/SerialIo.c b/MdeModulePkg/Universal/SerialDxe/SerialIo.c
index 964d0329f4..19fc889c25 100644
--- a/MdeModulePkg/Universal/SerialDxe/SerialIo.c
+++ b/MdeModulePkg/Universal/SerialDxe/SerialIo.c
@@ -67,7 +67,7 @@ SerialReset (
                            stop bits.
 
   @retval EFI_SUCCESS      The device was reset.
-  @retval EFI_DEVICE_ERROR The serial device could not be reset.
+  @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
 
 **/
 EFI_STATUS
@@ -265,7 +265,7 @@ SerialReset (
                            stop bits.
 
   @retval EFI_SUCCESS      The device was reset.
-  @retval EFI_DEVICE_ERROR The serial device could not be reset.
+  @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
 
 **/
 EFI_STATUS
diff --git a/MdePkg/Include/Protocol/SerialIo.h b/MdePkg/Include/Protocol/SerialIo.h
index 31cd46614e..84cb34364d 100644
--- a/MdePkg/Include/Protocol/SerialIo.h
+++ b/MdePkg/Include/Protocol/SerialIo.h
@@ -126,7 +126,7 @@ EFI_STATUS
                            stop bits.
 
   @retval EFI_SUCCESS      The device was reset.
-  @retval EFI_DEVICE_ERROR The serial device could not be reset.
+  @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
 
 **/
 typedef