diff --git a/platform/embedded/btstack_uart_block_embedded.c b/platform/embedded/btstack_uart_block_embedded.c
index 2ceafcf9a..4398cd150 100644
--- a/platform/embedded/btstack_uart_block_embedded.c
+++ b/platform/embedded/btstack_uart_block_embedded.c
@@ -202,6 +202,7 @@ static const btstack_uart_block_t btstack_uart_embedded = {
 	/* int (*get_supported_sleep_modes); */                           &btstack_uart_embedded_get_supported_sleep_modes,
     /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */    &btstack_uart_embedded_set_sleep,
     /* void (*set_wakeup_handler)(void (*handler)(void)); */          &btstack_uart_embedded_set_wakeup_handler,
+    NULL, NULL, NULL, NULL,
 };
 
 const btstack_uart_block_t * btstack_uart_block_embedded_instance(void){
diff --git a/platform/freertos/btstack_uart_block_freertos.c b/platform/freertos/btstack_uart_block_freertos.c
index eeba24e49..9ba61fb89 100644
--- a/platform/freertos/btstack_uart_block_freertos.c
+++ b/platform/freertos/btstack_uart_block_freertos.c
@@ -167,7 +167,8 @@ static const btstack_uart_block_t btstack_uart_block_freertos = {
     /* void (*send_block)(const uint8_t *buffer, uint16_t length); */ &hal_uart_dma_send_block,    
     /* int (*get_supported_sleep_modes); */                           NULL,
     /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */    NULL,
-    /* void (*set_wakeup_handler)(void (*wakeup_handler)(void)); */   NULL,   
+    /* void (*set_wakeup_handler)(void (*wakeup_handler)(void)); */   NULL,
+    NULL, NULL, NULL, NULL,
 };
 
 const btstack_uart_block_t * btstack_uart_block_freertos_instance(void){
diff --git a/platform/wiced/btstack_uart_block_wiced.c b/platform/wiced/btstack_uart_block_wiced.c
index c3e7c2007..d9e65c71b 100644
--- a/platform/wiced/btstack_uart_block_wiced.c
+++ b/platform/wiced/btstack_uart_block_wiced.c
@@ -378,6 +378,7 @@ static const btstack_uart_block_t btstack_uart_block_wiced = {
     /* int (*get_supported_sleep_modes); */                           NULL,
     /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */    NULL,
     /* void (*set_wakeup_handler)(void (*handler)(void)); */          NULL,
+    NULL, NULL, NULL, NULL,
 };
 
 const btstack_uart_block_t * btstack_uart_block_wiced_instance(void){
diff --git a/platform/windows/btstack_uart_block_windows.c b/platform/windows/btstack_uart_block_windows.c
index 48eb929d5..a9b11f841 100644
--- a/platform/windows/btstack_uart_block_windows.c
+++ b/platform/windows/btstack_uart_block_windows.c
@@ -471,6 +471,7 @@ static const btstack_uart_block_t btstack_uart_windows = {
     /* int (*get_supported_sleep_modes); */                           NULL,
     /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */    NULL,
     /* void (*set_wakeup_handler)(void (*handler)(void)); */          NULL,
+    NULL, NULL, NULL, NULL,
 };
 
 const btstack_uart_block_t * btstack_uart_block_windows_instance(void){
diff --git a/test/mesh/btstack_uart_posix_pty.c b/test/mesh/btstack_uart_posix_pty.c
index a0de76430..9936faeee 100644
--- a/test/mesh/btstack_uart_posix_pty.c
+++ b/test/mesh/btstack_uart_posix_pty.c
@@ -408,6 +408,7 @@ static const btstack_uart_block_t btstack_uart_posix = {
     /* int (*get_supported_sleep_modes); */                           NULL,
     /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */    NULL,
     /* void (*set_wakeup_handler)(void (*handler)(void)); */          NULL,
+    NULL, NULL, NULL, NULL,
 };
 
 const btstack_uart_block_t * btstack_uart_posix_instance(void){