diff --git a/MdePkg/Include/Base.h b/MdePkg/Include/Base.h
index 5eabb80eff..5b1f418d1a 100644
--- a/MdePkg/Include/Base.h
+++ b/MdePkg/Include/Base.h
@@ -636,7 +636,8 @@ typedef UINTN  *BASE_LIST;
   Both a and b must be the same numerical types, signed or unsigned.
 
   @param   a        The first operand with any numerical type.
-  @param   b        The second operand. It should be the same any numerical type with a.
+  @param   b        The second operand. Can be any numerical type as long as is 
+                    the same type as a.
   
   @return  Maximum of two operands.
   
diff --git a/MdePkg/Include/Protocol/Udp4.h b/MdePkg/Include/Protocol/Udp4.h
index f173816327..5541f5e692 100644
--- a/MdePkg/Include/Protocol/Udp4.h
+++ b/MdePkg/Include/Protocol/Udp4.h
@@ -168,7 +168,8 @@ EFI_STATUS
   @retval EFI_SUCCESS           The configuration settings were set, changed, or reset successfully.
   @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP,
                                 RARP, etc.) is not finished yet.
-  @retval EFI_INVALID_PARAMETER One or more following conditions are TRUE:
+  @retval EFI_INVALID_PARAMETER This is NULL.
+  @retval EFI_INVALID_PARAMETER UdpConfigData.StationAddress is not a valid unicast IPv4 address.
   @retval EFI_ALREADY_STARTED   The EFI UDPv4 Protocol instance is already started/configured
                                 and must be stopped/reset before it can be reconfigured.
   @retval EFI_ACCESS_DENIED     UdpConfigData. AllowDuplicatePort is FALSE
@@ -318,7 +319,8 @@ EFI_STATUS
   @retval EFI_NOT_STARTED       This EFI UDPv4 Protocol instance has not been started.
   @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP, RARP, etc.)
                                 is not finished yet.
-  @retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
+  @retval EFI_INVALID_PARAMETER This is NULL.
+  @retval EFI_INVALID_PARAMETER UdpConfigData.StationAddress is not a valid unicast IPv4 address.
   @retval EFI_OUT_OF_RESOURCES  The receive completion token could not be queued due to a lack of system
                                 resources (usually memory).
   @retval EFI_DEVICE_ERROR      An unexpected system or network error occurred.