diff --git a/MdePkg/Include/Protocol/Mtftp4.h b/MdePkg/Include/Protocol/Mtftp4.h
index 095b81b285..b170440d94 100644
--- a/MdePkg/Include/Protocol/Mtftp4.h
+++ b/MdePkg/Include/Protocol/Mtftp4.h
@@ -413,7 +413,7 @@ EFI_STATUS
   @retval EFI_OUT_OF_RESOURCES     Required system resources could not be allocated.
   @retval EFI_BUFFER_TOO_SMALL     BufferSize is not zero but not large enough to hold the
                                    downloaded data in downloading process.
-								   Note: It does not match UEFI 2.3 Specification.
+                                   Note: It does not match UEFI 2.3 Specification.
   @retval EFI_ABORTED              Current operation is aborted by user.
   @retval EFI_NETWORK_UNREACHABLE  An ICMP network unreachable error packet was received.
                                    Note: It is not defined in UEFI 2.3 Specification.
diff --git a/MdePkg/Include/Protocol/Mtftp6.h b/MdePkg/Include/Protocol/Mtftp6.h
index 9debfe66d4..6d7a035324 100644
--- a/MdePkg/Include/Protocol/Mtftp6.h
+++ b/MdePkg/Include/Protocol/Mtftp6.h
@@ -507,15 +507,15 @@ EFI_STATUS
   @retval  EFI_ACCESS_DENIED     - The configuration could not be changed at this time because there 
                                    is some MTFTP background operation in progress.
                                  - MtftpCofigData.LocalPort is already in use.
-								 Note: It does not match UEFI 2.3 Specification.
+                                 Note: It does not match UEFI 2.3 Specification.
   @retval  EFI_NO_MAPPING        The underlying IPv6 driver was responsible for choosing a source 
                                  address for this instance, but no source address was available for use.
   @retval  EFI_OUT_OF_RESOURCES  The EFI MTFTPv6 Protocol driver instance data could not be 
                                  allocated.
-								 Note: It is not defined in UEFI 2.3 Specification.
+                                 Note: It is not defined in UEFI 2.3 Specification.
   @retval  EFI_DEVICE_ERROR      An unexpected system or network error occurred. The EFI 
                                  MTFTPv6 Protocol driver instance is not configured.
-								 Note: It is not defined in UEFI 2.3 Specification.
+                                 Note: It is not defined in UEFI 2.3 Specification.
 
 
 **/
@@ -654,7 +654,7 @@ EFI_STATUS
   @retval  EFI_OUT_OF_RESOURCES     Required system resources could not be allocated.
   @retval  EFI_BUFFER_TOO_SMALL     BufferSize is not zero but not large enough to hold the
                                     downloaded data in downloading process.
-									Note: It does not match UEFI 2.3 Specification.
+                                    Note: It does not match UEFI 2.3 Specification.
   @retval  EFI_ABORTED              Current operation is aborted by user.
   @retval  EFI_NETWORK_UNREACHABLE  An ICMP network unreachable error packet was received.
                                     Note: It is not defined in UEFI 2.3 Specification.