diff --git a/hal/targets/hal/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PeripheralPins.c b/hal/targets/hal/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PeripheralPins.c
index f5f80edabb..d2864671a4 100644
--- a/hal/targets/hal/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PeripheralPins.c
+++ b/hal/targets/hal/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PeripheralPins.c
@@ -255,7 +255,7 @@ const PinMap PinMap_UART_CTS[] = {
 //*** SPI ***
 
 const PinMap PinMap_SPI_MOSI[] = {
-//  {PA_7,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, // Ethernet RMII RX Data Valid
+    {PA_7,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, // Ethernet RMII RX Data Valid // D11
     {PB_5,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
 //  {PB_5,  SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)}, // choice: PB_5 with SPI_1
     {PB_15, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
diff --git a/hal/targets/hal/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PinNames.h b/hal/targets/hal/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PinNames.h
index a55aba285c..5dca8a99aa 100644
--- a/hal/targets/hal/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PinNames.h
+++ b/hal/targets/hal/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PinNames.h
@@ -235,7 +235,7 @@ typedef enum {
     USBRX       = SERIAL_RX,
     I2C_SCL     = D15,
     I2C_SDA     = D14,
-    SPI_MOSI    = D11,
+    SPI_MOSI    = PB_5, // Conflict between D11 and RMII RX Data Valid (PA7)
     SPI_MISO    = D12,
     SPI_SCK     = D13,
     SPI_CS      = D10,