diff --git a/targets/TARGET_STM/i2c_api.c b/targets/TARGET_STM/i2c_api.c
index e4ef911b03..a1b55ff818 100644
--- a/targets/TARGET_STM/i2c_api.c
+++ b/targets/TARGET_STM/i2c_api.c
@@ -562,7 +562,6 @@ i2c_t *get_i2c_obj(I2C_HandleTypeDef *hi2c)
 
 void i2c_reset(i2c_t *obj)
 {
-    struct i2c_s *obj_s = I2C_S(obj);
     /*  As recommended in i2c_api.h, mainly send stop */
     i2c_stop(obj);
     /* then re-init */
diff --git a/targets/TARGET_STM/stm_spi_api.c b/targets/TARGET_STM/stm_spi_api.c
index d6d2aaa4d0..d2b1221a03 100644
--- a/targets/TARGET_STM/stm_spi_api.c
+++ b/targets/TARGET_STM/stm_spi_api.c
@@ -105,7 +105,6 @@ void spi_get_capabilities(PinName ssel, bool slave, spi_capabilities_t *cap)
 
     // check if given ssel pin is in the cs pinmap
     const PinMap *cs_pins = spi_master_cs_pinmap();
-    PinName pin = NC;
     while (cs_pins->pin != NC) {
         if (cs_pins->pin == ssel) {
 #if DEVICE_SPISLAVE