diff --git a/stm-firmware/main-cycle-counter.c b/stm-firmware/main-cycle-counter.c
index d0b889b..07b4cac 100644
--- a/stm-firmware/main-cycle-counter.c
+++ b/stm-firmware/main-cycle-counter.c
@@ -1,39 +1,39 @@
 /* Reflow Oven Controller
-*
-* Copyright (C) 2020  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) 2020  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/>.
+ */
 
 #include <reflow-controller/main-cycle-counter.h>
 #include <helper-macros/helper-macros.h>
 
 static uint64_t IN_SECTION(.ccm.bss) main_cycle_counter;
 
-void main_cycle_counter_init()
+void main_cycle_counter_init(void)
 {
 	main_cycle_counter = 0ULL;
 }
 
-void main_cycle_counter_inc()
+void main_cycle_counter_inc(void)
 {
 	main_cycle_counter++;
 }
 
-uint64_t main_cycle_counter_get()
+uint64_t main_cycle_counter_get(void)
 {
 	return main_cycle_counter;
 }