diff --git a/demos/STM32/RT-STM32F303ZE-NUCLEO144/main.c b/demos/STM32/RT-STM32F303ZE-NUCLEO144/main.c
index fa8247b41..8e76d745b 100644
--- a/demos/STM32/RT-STM32F303ZE-NUCLEO144/main.c
+++ b/demos/STM32/RT-STM32F303ZE-NUCLEO144/main.c
@@ -59,7 +59,7 @@ int main(void) {
   chSysInit();
 
   /*
-   * Activates the serial driver 1 using the driver default configuration.
+   * Activates the serial driver 3 using the driver default configuration.
    */
   sdStart(&SD3, NULL);
 
diff --git a/demos/STM32/RT-STM32F429ZI-NUCLEO144/main.c b/demos/STM32/RT-STM32F429ZI-NUCLEO144/main.c
index fa8247b41..8e76d745b 100644
--- a/demos/STM32/RT-STM32F429ZI-NUCLEO144/main.c
+++ b/demos/STM32/RT-STM32F429ZI-NUCLEO144/main.c
@@ -59,7 +59,7 @@ int main(void) {
   chSysInit();
 
   /*
-   * Activates the serial driver 1 using the driver default configuration.
+   * Activates the serial driver 3 using the driver default configuration.
    */
   sdStart(&SD3, NULL);
 
diff --git a/demos/STM32/RT-STM32F446ZE-NUCLEO144/main.c b/demos/STM32/RT-STM32F446ZE-NUCLEO144/main.c
index fa8247b41..8e76d745b 100644
--- a/demos/STM32/RT-STM32F446ZE-NUCLEO144/main.c
+++ b/demos/STM32/RT-STM32F446ZE-NUCLEO144/main.c
@@ -59,7 +59,7 @@ int main(void) {
   chSysInit();
 
   /*
-   * Activates the serial driver 1 using the driver default configuration.
+   * Activates the serial driver 3 using the driver default configuration.
    */
   sdStart(&SD3, NULL);
 
diff --git a/demos/STM32/RT-STM32F746ZG-NUCLEO144/main.c b/demos/STM32/RT-STM32F746ZG-NUCLEO144/main.c
index fa8247b41..8e76d745b 100644
--- a/demos/STM32/RT-STM32F746ZG-NUCLEO144/main.c
+++ b/demos/STM32/RT-STM32F746ZG-NUCLEO144/main.c
@@ -59,7 +59,7 @@ int main(void) {
   chSysInit();
 
   /*
-   * Activates the serial driver 1 using the driver default configuration.
+   * Activates the serial driver 3 using the driver default configuration.
    */
   sdStart(&SD3, NULL);