diff --git a/bsps/arm/stm32f4/console/usart.c b/bsps/arm/stm32f4/console/usart.c
index 0c9b2344b1..7035112c52 100644
--- a/bsps/arm/stm32f4/console/usart.c
+++ b/bsps/arm/stm32f4/console/usart.c
@@ -177,6 +177,8 @@ static void usart_initialize(int minor)
 
 static int usart_first_open(int major, int minor, void *arg)
 {
+  (void) major;
+
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   rtems_libio_open_close_args_t *oc = (rtems_libio_open_close_args_t *) arg;
   rtems_termios_tty *tty = (struct rtems_termios_tty *) oc->iop->data1;
@@ -199,6 +201,8 @@ static int usart_first_open(int major, int minor, void *arg)
 
 static int usart_last_close(int major, int minor, void *arg)
 {
+  (void) major;
+
   rtems_status_code sc = RTEMS_SUCCESSFUL;
 #ifdef BSP_CONSOLE_USE_INTERRUPTS
   rtems_libio_open_close_args_t *oc = (rtems_libio_open_close_args_t *) arg;
@@ -206,6 +210,9 @@ static int usart_last_close(int major, int minor, void *arg)
   const console_tbl *ct = Console_Port_Tbl [minor];
 
   sc = rtems_interrupt_handler_remove(ct->ulIntVector, stm32f4_usart_interrupt, tty);
+#else
+  (void) minor;
+  (void) arg;
 #endif
   return sc;
 }
diff --git a/bsps/arm/stm32f4/i2c/i2c.c b/bsps/arm/stm32f4/i2c/i2c.c
index 7af18afe10..ff9cd42e32 100644
--- a/bsps/arm/stm32f4/i2c/i2c.c
+++ b/bsps/arm/stm32f4/i2c/i2c.c
@@ -40,6 +40,8 @@ static stm32f4_rcc_index i2c_get_rcc_index(stm32f4_i2c_bus_entry *e)
 
 static uint32_t i2c_get_pclk(stm32f4_i2c_bus_entry *e)
 {
+  (void) e;
+
   return STM32F4_PCLK1;
 }