diff --git a/stm-firmware/include/reflow-controller/settings/settings.h b/stm-firmware/include/reflow-controller/settings/settings.h
index 31a02b4..de4ba2b 100644
--- a/stm-firmware/include/reflow-controller/settings/settings.h
+++ b/stm-firmware/include/reflow-controller/settings/settings.h
@@ -22,6 +22,6 @@
 #ifndef __SETTINGS_SETTINGS_H__
 #define __SETTINGS_SETTINGS_H__
 
-settings_save_calibration();
+int settings_save_calibration();
 
 #endif /* __SETTINGS_SETTINGS_H__ */
diff --git a/stm-firmware/settings/settings.c b/stm-firmware/settings/settings.c
index 07643ce..a93b356 100644
--- a/stm-firmware/settings/settings.c
+++ b/stm-firmware/settings/settings.c
@@ -19,3 +19,8 @@
 */
 
 #include <reflow-controller/settings/settings.h>
+
+int settings_save_calibration()
+{
+	return 0;
+}