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-rw-r--r--stmhal/i2c.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/stmhal/i2c.h b/stmhal/i2c.h
index 849d3987c4..a159935e6a 100644
--- a/stmhal/i2c.h
+++ b/stmhal/i2c.h
@@ -29,6 +29,7 @@
extern I2C_HandleTypeDef I2CHandle1;
extern I2C_HandleTypeDef I2CHandle2;
+extern I2C_HandleTypeDef I2CHandle3;
extern const mp_obj_type_t pyb_i2c_type;
void i2c_init0(void);