diff --git a/inc/i2c.h b/inc/i2c.h
--- a/inc/i2c.h
+++ b/inc/i2c.h
@@ -4,6 +4,7 @@
 #include "stm32f0xx_hal.h"
 
 void i2c_init(void);
+void i2c_deinit(void);
 I2C_HandleTypeDef* i2c_get(void);
 
 #endif