diff --git a/stm-firmware/adc-meas.c b/stm-firmware/adc-meas.c
index b98b4a2..bbaf499 100644
--- a/stm-firmware/adc-meas.c
+++ b/stm-firmware/adc-meas.c
@@ -315,7 +315,8 @@ static inline __attribute__((optimize("O3"))) void adc_pt1000_filter(float adc_p
 		stable_sample_counter = 0;
 		alpha = ADC_PT1000_FILTER_WEIGHT_FAST;
 		if (old_state != 1) {
-			safety_controller_report_error_with_key(ERR_FLAG_MEAS_ADC_UNSTABLE, MEAS_ADC_SAFETY_FLAG_KEY);
+			safety_controller_report_error_with_key(ERR_FLAG_MEAS_ADC_UNSTABLE,
+								MEAS_ADC_SAFETY_FLAG_KEY);
 			old_state = 1;
 		}
 	} else {
@@ -323,7 +324,8 @@ static inline __attribute__((optimize("O3"))) void adc_pt1000_filter(float adc_p
 		if (old_state != 2) {
 			stable_sample_counter++;
 			if (stable_sample_counter >= ADC_PT1000_FILTER_STABLE_SAMPLE_COUNT) {
-				safety_controller_ack_flag_with_key(ERR_FLAG_MEAS_ADC_UNSTABLE, MEAS_ADC_SAFETY_FLAG_KEY);
+				safety_controller_ack_flag_with_key(ERR_FLAG_MEAS_ADC_UNSTABLE,
+								    MEAS_ADC_SAFETY_FLAG_KEY);
 				old_state = 2;
 			}
 		}
diff --git a/stm-firmware/digio.c b/stm-firmware/digio.c
index 190f073..10f7a85 100644
--- a/stm-firmware/digio.c
+++ b/stm-firmware/digio.c
@@ -172,11 +172,10 @@ void loudspeaker_set(uint16_t val)
 {
 	loudspeaker_val = val;
 
-	if (!val) {
+	if (!val)
 		loudspeaker_stop_beep();
-	} else {
+	else
 		loudspeaker_start_beep(val);
-	}
 }
 
 uint16_t loudspeaker_get(void)
diff --git a/stm-firmware/hw-version-detect.c b/stm-firmware/hw-version-detect.c
index 4d842aa..73684a1 100644
--- a/stm-firmware/hw-version-detect.c
+++ b/stm-firmware/hw-version-detect.c
@@ -1,22 +1,22 @@
 /* Reflow Oven Controller
-*
-* Copyright (C) 2021  Mario Hüttel <mario.huettel@gmx.net>
-*
-* This file is part of the Reflow Oven Controller Project.
-*
-* The reflow oven controller is free software: you can redistribute it and/or modify
-* it under the terms of the GNU General Public License version 2 as
-* published by the Free Software Foundation.
-*
-* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-* GNU General Public License for more details.
-*
-* You should have received a copy of the GNU General Public License
-* along with the reflow oven controller project.
-* If not, see <http://www.gnu.org/licenses/>.
-*/
+ *
+ * Copyright (C) 2021  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of the Reflow Oven Controller Project.
+ *
+ * The reflow oven controller is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the reflow oven controller project.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
 
 /**
  * @addtogroup hw-version-detect