diff --git a/targets/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PeripheralPins.c b/targets/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PeripheralPins.c
index fa19697262..5fac8c2e29 100644
--- a/targets/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PeripheralPins.c
+++ b/targets/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PeripheralPins.c
@@ -107,7 +107,7 @@ const PinMap PinMap_I2C_SDA[] = {
 //  {PB_7,  I2C_1   , STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C1)}, // LED2
     {PB_9,  I2C_1   , STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C1)},
     {PB_11, I2C_2   , STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C2)},
-    {PC_9,  I2C_3   , STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C3)},
+//  {PC_9,  I2C_3   , STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C3)}, // no I2C_3 SCL available
     {PF_0,  I2C_2   , STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C2)},
     {NC,    NC,    0}
 };