diff --git a/stm-firmware/calibration.c b/stm-firmware/calibration.c
index f20aa9b..1985cd7 100644
--- a/stm-firmware/calibration.c
+++ b/stm-firmware/calibration.c
@@ -142,7 +142,6 @@ static float calculate_standard_deviation(float *values, uint32_t count, float m
 static int calibration_poll_data_acquisition(float *mem_array, uint32_t count, volatile int *flag, float *mu, float *std_dev)
 {
 	int ret_val = 0;
-	uint32_t i;
 
 	if (!flag || !mem_array || !mu || !std_dev)
 		return -1000;
diff --git a/stm-firmware/settings/settings-sd-card.c b/stm-firmware/settings/settings-sd-card.c
index 9fc14f8..d45a253 100644
--- a/stm-firmware/settings/settings-sd-card.c
+++ b/stm-firmware/settings/settings-sd-card.c
@@ -88,7 +88,7 @@ int sd_card_settings_save_calibration(float sens_deviation, float offset, bool a
 {
 	char path[200];
 	FRESULT res = FR_OK;
-	int ret;
+	int ret = 0;
 	FIL file;
 
 	get_controller_settings_path(path, sizeof(path), "calibration");