diff --git a/include/configs/ls2085a_common.h b/include/configs/ls2085a_common.h
index aca7301..26ef32a 100644
--- a/include/configs/ls2085a_common.h
+++ b/include/configs/ls2085a_common.h
@@ -84,6 +84,8 @@
 #define CONFIG_CMD_I2C
 #define CONFIG_SYS_I2C
 #define CONFIG_SYS_I2C_MXC
+#define CONFIG_SYS_I2C_MXC_I2C3		/* enable I2C bus 3 */
+#define CONFIG_SYS_I2C_MXC_I2C4		/* enable I2C bus 4 */
 #define CONFIG_SYS_MXC_I2C1_SPEED	40000000
 #define CONFIG_SYS_MXC_I2C2_SPEED	40000000