diff --git a/os/hal/platforms/STM32/i2c_lld.h b/os/hal/platforms/STM32/i2c_lld.h
index 00eef923d..0e77dadb8 100644
--- a/os/hal/platforms/STM32/i2c_lld.h
+++ b/os/hal/platforms/STM32/i2c_lld.h
@@ -61,6 +61,15 @@
 #define STM32_I2C_USE_I2C2              TRUE
 #endif
 
+/**
+ * @brief I2C3 driver enable switch.
+ * @details If set to @p TRUE the support for I2C3 is included.
+ * @note The default is @p TRUE.
+ */
+#if !defined(STM32_I2C_USE_I2C3) || defined(__DOXYGEN__)
+#define STM32_I2C_USE_I2C3              TRUE
+#endif
+
 /**
  * @brief I2C1 interrupt priority level setting.
  * @note @p BASEPRI_KERNEL >= @p STM32_I2C_I2C1_IRQ_PRIORITY > @p PRIORITY_PENDSV.
@@ -76,6 +85,14 @@
 #if !defined(STM32_I2C_I2C2_IRQ_PRIORITY) || defined(__DOXYGEN__)
 #define STM32_I2C_I2C2_IRQ_PRIORITY     0xA0
 #endif
+
+/**
+ * @brief I2C2 interrupt priority level setting.
+ * @note @p BASEPRI_KERNEL >= @p STM32_I2C_I2C2_IRQ_PRIORITY > @p PRIORITY_PENDSV.
+ */
+#if !defined(STM32_I2C_I2C3_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define STM32_I2C_I2C3_IRQ_PRIORITY     0xA0
+#endif
 /** @} */
 
 /*===========================================================================*/