diff --git a/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC81X/device.h b/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC81X/device.h
index 36714be3a4..4ee3403e37 100644
--- a/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC81X/device.h
+++ b/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC81X/device.h
@@ -29,7 +29,7 @@
 #define DEVICE_SERIAL_FC        1
 
 #define DEVICE_I2C              1
-#define DEVICE_I2CSLAVE         1
+#define DEVICE_I2CSLAVE         0
 
 #define DEVICE_SPI              1
 #define DEVICE_SPISLAVE         1