diff --git a/examples/nucleo_f429zi/ethernet/FreeRTOSIPConfigLocal.h b/examples/nucleo_f429zi/ethernet/FreeRTOSIPConfigLocal.h
index 7e9dd59fd8..a31f2f2abf 100644
--- a/examples/nucleo_f429zi/ethernet/FreeRTOSIPConfigLocal.h
+++ b/examples/nucleo_f429zi/ethernet/FreeRTOSIPConfigLocal.h
@@ -71,14 +71,6 @@ a socket. */
 #define ipconfigDNS_CACHE_ENTRIES			( 4 )
 #define ipconfigDNS_REQUEST_ATTEMPTS		( 2 )
 
-/* ipconfigRAND32() is called by the IP stack to generate random numbers for
-things such as a DHCP transaction number or initial sequence number.  Random
-number generation is performed via this macro to allow applications to use their
-own random number generation method.  For example, it might be possible to
-generate a random number by sampling noise on an analogue input. */
-extern UBaseType_t uxRand(void);
-#define ipconfigRAND32()	uxRand()
-
 /* If ipconfigUSE_NETWORK_EVENT_HOOK is set to 1 then FreeRTOS+TCP will call the
 network event hook at the appropriate times.  If ipconfigUSE_NETWORK_EVENT_HOOK
 is not set to 1 then the network event hook will never be called.  See
diff --git a/examples/nucleo_f767zi/ethernet/FreeRTOSIPConfigLocal.h b/examples/nucleo_f767zi/ethernet/FreeRTOSIPConfigLocal.h
index 7e9dd59fd8..a31f2f2abf 100644
--- a/examples/nucleo_f767zi/ethernet/FreeRTOSIPConfigLocal.h
+++ b/examples/nucleo_f767zi/ethernet/FreeRTOSIPConfigLocal.h
@@ -71,14 +71,6 @@ a socket. */
 #define ipconfigDNS_CACHE_ENTRIES			( 4 )
 #define ipconfigDNS_REQUEST_ATTEMPTS		( 2 )
 
-/* ipconfigRAND32() is called by the IP stack to generate random numbers for
-things such as a DHCP transaction number or initial sequence number.  Random
-number generation is performed via this macro to allow applications to use their
-own random number generation method.  For example, it might be possible to
-generate a random number by sampling noise on an analogue input. */
-extern UBaseType_t uxRand(void);
-#define ipconfigRAND32()	uxRand()
-
 /* If ipconfigUSE_NETWORK_EVENT_HOOK is set to 1 then FreeRTOS+TCP will call the
 network event hook at the appropriate times.  If ipconfigUSE_NETWORK_EVENT_HOOK
 is not set to 1 then the network event hook will never be called.  See
diff --git a/ext/aws/freertos b/ext/aws/freertos
index c6ae9ef30f..2422cfeebc 160000
--- a/ext/aws/freertos
+++ b/ext/aws/freertos
@@ -1 +1 @@
-Subproject commit c6ae9ef30f1d6a3d493f474989330b6fba98c111
+Subproject commit 2422cfeebc1dc38c837f0fda778802e800132d7a