diff --git a/targets/CMSIS-OS/ChibiOS/NETDUINO3_WIFI/target_windows_devices_adc_config.cpp b/targets/CMSIS-OS/ChibiOS/NETDUINO3_WIFI/target_windows_devices_adc_config.cpp
index 5bddfdec47..abae7b9fdc 100644
--- a/targets/CMSIS-OS/ChibiOS/NETDUINO3_WIFI/target_windows_devices_adc_config.cpp
+++ b/targets/CMSIS-OS/ChibiOS/NETDUINO3_WIFI/target_windows_devices_adc_config.cpp
@@ -21,9 +21,9 @@ const NF_PAL_ADC_PORT_PIN_CHANNEL AdcPortPinConfig[] = {
     {3, GPIOC, 5, ADC_CHANNEL_IN13},
 
     // these are the internal sources, available only at ADC1
-    {1, NULL, NULL, ADC_CHANNEL_SENSOR},
-    {1, NULL, NULL, ADC_CHANNEL_VREFINT},
-    {1, NULL, NULL, ADC_CHANNEL_VBAT},
+    {1, NULL, 0, ADC_CHANNEL_SENSOR},
+    {1, NULL, 0, ADC_CHANNEL_VREFINT},
+    {1, NULL, 0, ADC_CHANNEL_VBAT},
 };
 
 const int AdcChannelCount = ARRAYSIZE(AdcPortPinConfig);
diff --git a/targets/CMSIS-OS/ChibiOS/ST_NUCLEO144_F746ZG/target_windows_devices_adc_config.cpp b/targets/CMSIS-OS/ChibiOS/ST_NUCLEO144_F746ZG/target_windows_devices_adc_config.cpp
index 48be42742a..269afb4df0 100644
--- a/targets/CMSIS-OS/ChibiOS/ST_NUCLEO144_F746ZG/target_windows_devices_adc_config.cpp
+++ b/targets/CMSIS-OS/ChibiOS/ST_NUCLEO144_F746ZG/target_windows_devices_adc_config.cpp
@@ -24,9 +24,9 @@ const NF_PAL_ADC_PORT_PIN_CHANNEL AdcPortPinConfig[] = {
     {3, GPIOF, 4, ADC_CHANNEL_IN14},
     
     // these are the internal sources, available only at ADC1
-    {1, NULL, NULL, ADC_CHANNEL_SENSOR},
-    {1, NULL, NULL, ADC_CHANNEL_VREFINT},
-    {1, NULL, NULL, ADC_CHANNEL_VBAT},
+    {1, NULL, 0, ADC_CHANNEL_SENSOR},
+    {1, NULL, 0, ADC_CHANNEL_VREFINT},
+    {1, NULL, 0, ADC_CHANNEL_VBAT},
 };
 
 const int AdcChannelCount = ARRAYSIZE(AdcPortPinConfig);
diff --git a/targets/CMSIS-OS/ChibiOS/ST_STM32F429I_DISCOVERY/target_windows_devices_adc_config.cpp b/targets/CMSIS-OS/ChibiOS/ST_STM32F429I_DISCOVERY/target_windows_devices_adc_config.cpp
index 29d1918bae..d591bee1da 100644
--- a/targets/CMSIS-OS/ChibiOS/ST_STM32F429I_DISCOVERY/target_windows_devices_adc_config.cpp
+++ b/targets/CMSIS-OS/ChibiOS/ST_STM32F429I_DISCOVERY/target_windows_devices_adc_config.cpp
@@ -18,9 +18,9 @@ const NF_PAL_ADC_PORT_PIN_CHANNEL AdcPortPinConfig[] = {
     {3, GPIOF, 6, ADC_CHANNEL_IN4},
 
     // these are the internal sources, available only at ADC1
-    {1, NULL, NULL, ADC_CHANNEL_SENSOR},
-    {1, NULL, NULL, ADC_CHANNEL_VREFINT},
-    {1, NULL, NULL, ADC_CHANNEL_VBAT},
+    {1, NULL, 0, ADC_CHANNEL_SENSOR},
+    {1, NULL, 0, ADC_CHANNEL_VREFINT},
+    {1, NULL, 0, ADC_CHANNEL_VBAT},
 };
 
 const int AdcChannelCount = ARRAYSIZE(AdcPortPinConfig);
diff --git a/targets/CMSIS-OS/ChibiOS/ST_STM32F4_DISCOVERY/target_windows_devices_adc_config.cpp b/targets/CMSIS-OS/ChibiOS/ST_STM32F4_DISCOVERY/target_windows_devices_adc_config.cpp
index 6809a4c6f5..c6f2343059 100644
--- a/targets/CMSIS-OS/ChibiOS/ST_STM32F4_DISCOVERY/target_windows_devices_adc_config.cpp
+++ b/targets/CMSIS-OS/ChibiOS/ST_STM32F4_DISCOVERY/target_windows_devices_adc_config.cpp
@@ -18,9 +18,9 @@ const NF_PAL_ADC_PORT_PIN_CHANNEL AdcPortPinConfig[] = {
     {2, GPIOB, 0, ADC_CHANNEL_IN8},
 
     // these are the internal sources, available only at ADC1
-    {1, NULL, NULL, ADC_CHANNEL_SENSOR},
-    {1, NULL, NULL, ADC_CHANNEL_VREFINT},
-    {1, NULL, NULL, ADC_CHANNEL_VBAT},
+    {1, NULL, 0, ADC_CHANNEL_SENSOR},
+    {1, NULL, 0, ADC_CHANNEL_VREFINT},
+    {1, NULL, 0, ADC_CHANNEL_VBAT},
 };
 
 const int AdcChannelCount = ARRAYSIZE(AdcPortPinConfig);
diff --git a/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/target_windows_devices_adc_config.cpp b/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/target_windows_devices_adc_config.cpp
index bcffdef70f..e5f36825ea 100644
--- a/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/target_windows_devices_adc_config.cpp
+++ b/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/target_windows_devices_adc_config.cpp
@@ -18,9 +18,9 @@ const NF_PAL_ADC_PORT_PIN_CHANNEL AdcPortPinConfig[] = {
     {3, GPIOB, 8, ADC_CHANNEL_IN7},
 
     // these are the internal sources, available only at ADC1
-    {1, NULL, NULL, ADC_CHANNEL_SENSOR},
-    {1, NULL, NULL, ADC_CHANNEL_VREFINT},
-    {1, NULL, NULL, ADC_CHANNEL_VBAT},
+    {1, NULL, 0, ADC_CHANNEL_SENSOR},
+    {1, NULL, 0, ADC_CHANNEL_VREFINT},
+    {1, NULL, 0, ADC_CHANNEL_VBAT},
 };
 
 const int AdcChannelCount = ARRAYSIZE(AdcPortPinConfig);