diff --git a/chip/stm32l/i2c.c b/chip/stm32l/i2c.c
index 1ff3b88f90..ac29490a3b 100644
--- a/chip/stm32l/i2c.c
+++ b/chip/stm32l/i2c.c
@@ -18,7 +18,7 @@
 #define CPRINTF(format, args...) cprintf(CC_I2C, format, ## args)
 
 /* 8-bit I2C slave address */
-#define I2C_ADDRESS 0xec
+#define I2C_ADDRESS 0x3c
 
 /* I2C bus frequency */
 #define I2C_FREQ 100000 /* Hz */