diff --git a/os/hal/platforms/STM32/i2c_lld.h b/os/hal/platforms/STM32/i2c_lld.h
index 548b5418e..aa11bb543 100644
--- a/os/hal/platforms/STM32/i2c_lld.h
+++ b/os/hal/platforms/STM32/i2c_lld.h
@@ -212,7 +212,7 @@ struct I2CDriver{
   /**
    * @brief Current slave configuration data.
    */
-  const I2CSlaveConfig  *id_slave_config;
+  I2CSlaveConfig        *id_slave_config;
 
   __IO size_t           txbytes;    /*!< @brief Number of bytes to be transmitted. */
   __IO size_t           rxbytes;    /*!< @brief Number of bytes to be received. */