diff --git a/source/FreeRTOS_DNS.c b/source/FreeRTOS_DNS.c
index 0eb249e4c..f3eca7605 100644
--- a/source/FreeRTOS_DNS.c
+++ b/source/FreeRTOS_DNS.c
@@ -150,7 +150,7 @@
  * The MAC-addresses are provided here in case a network
  * interface needs it.
  */
-        const MACAddress_t xMDNS_MACAddressIPv6 = { { 0x33, 0x33, 0x00, 0x00, 0x00, 0xFB } };
+        const MACAddress_t xMDNS_MacAddressIPv6 = { { 0x33, 0x33, 0x00, 0x00, 0x00, 0xFB } };
     #endif /* ( ipconfigUSE_MDNS == 1 ) && ( ipconfigUSE_IPv6 != 0 ) */
 
 
diff --git a/source/include/FreeRTOS_DNS.h b/source/include/FreeRTOS_DNS.h
index 927921ec2..c69db0e93 100644
--- a/source/include/FreeRTOS_DNS.h
+++ b/source/include/FreeRTOS_DNS.h
@@ -71,7 +71,12 @@ uint32_t ulDNSHandlePacket( const NetworkBufferDescriptor_t * pxNetworkBuffer );
     extern const IPv6_Address_t ipMDNS_IP_ADDR_IPv6;
 
 /* The MDNS IPv6 MAC address is 33:33:00:01:00:03 */
-    extern const MACAddress_t xMDNS_MACAddressIPv6;
+
+/* This type-name was formally "misspelled" as
+ * xMDNS_MACAddressIPv6 with "MAC": */
+    extern const MACAddress_t xMDNS_MacAddressIPv6;
+    /* Guarantee backward compatibility. */
+    #define xMDNS_MACAddressIPv6    xMDNS_MacAddressIPv6
 #endif /* ipconfigUSE_MDNS */
 
 /** @brief While doing integration tests, it is necessary to influence the choice
diff --git a/source/portable/NetworkInterface/DriverSAM/NetworkInterface.c b/source/portable/NetworkInterface/DriverSAM/NetworkInterface.c
index c787bbd0b..88679b7a7 100644
--- a/source/portable/NetworkInterface/DriverSAM/NetworkInterface.c
+++ b/source/portable/NetworkInterface/DriverSAM/NetworkInterface.c
@@ -787,7 +787,7 @@ static BaseType_t prvGMACInit( NetworkInterface_t * pxInterface )
 
         #if ( ipconfigUSE_MDNS == ipconfigENABLE )
         {
-            prvAddAllowedMACAddress( pxInterface, xMDNS_MACAddressIPv6.ucBytes );
+            prvAddAllowedMACAddress( pxInterface, xMDNS_MacAddressIPv6.ucBytes );
         }
         #endif /* ipconfigUSE_MDNS */
     }
diff --git a/source/portable/NetworkInterface/STM32Fxx/NetworkInterface.c b/source/portable/NetworkInterface/STM32Fxx/NetworkInterface.c
index 64e8071f5..2e06048bd 100644
--- a/source/portable/NetworkInterface/STM32Fxx/NetworkInterface.c
+++ b/source/portable/NetworkInterface/STM32Fxx/NetworkInterface.c
@@ -537,7 +537,7 @@ BaseType_t xSTM32F_NetworkInterfaceInitialise( NetworkInterface_t * pxInterface
             #endif
             #if ( ( ipconfigUSE_MDNS == 1 ) && ( ipconfigUSE_IPv6 != 0 ) )
             {
-                prvMACAddressConfig( &xETH, xMACEntry, ( uint8_t * ) xMDNS_MACAddressIPv6.ucBytes );
+                prvMACAddressConfig( &xETH, xMACEntry, ( uint8_t * ) xMDNS_MacAddressIPv6.ucBytes );
                 xMACEntry += 8;
             }
             #endif
diff --git a/source/portable/NetworkInterface/Zynq/NetworkInterface.c b/source/portable/NetworkInterface/Zynq/NetworkInterface.c
index 25dfd8e0f..aa0cd363f 100644
--- a/source/portable/NetworkInterface/Zynq/NetworkInterface.c
+++ b/source/portable/NetworkInterface/Zynq/NetworkInterface.c
@@ -288,7 +288,7 @@ static BaseType_t xZynqNetworkInterfaceInitialise( NetworkInterface_t * pxInterf
 
         #if ( ( ipconfigUSE_MDNS == 1 ) && ( ipconfigUSE_IPv6 != 0 ) )
             XEmacPs_SetHash( pxEMAC_PS, ( void * ) xMDNS_MacAddress.ucBytes );
-            XEmacPs_SetHash( pxEMAC_PS, ( void * ) xMDNS_MACAddressIPv6.ucBytes );
+            XEmacPs_SetHash( pxEMAC_PS, ( void * ) xMDNS_MacAddressIPv6.ucBytes );
         #endif
 
         pxEndPoint = FreeRTOS_NextEndPoint( pxInterface, pxEndPoint );