diff --git a/src/i2c/i2c.c b/src/i2c/i2c.c
index a870c4f..ed57d2d 100644
--- a/src/i2c/i2c.c
+++ b/src/i2c/i2c.c
@@ -215,8 +215,9 @@ mraa_i2c_read(mraa_i2c_context dev, uint8_t* data, int length)
 uint8_t
 mraa_i2c_read_byte(mraa_i2c_context dev)
 {
+    if (IS_FUNC_DEFINED(dev, i2c_read_replace))
+        return dev->advance_func->i2c_read_byte_replace(dev);
     i2c_smbus_data_t d;
-
     if (mraa_i2c_smbus_access(dev->fh, I2C_SMBUS_READ, I2C_NOCMD, I2C_SMBUS_BYTE, &d) < 0) {
         syslog(LOG_ERR, "i2c: Failed to write");
         return 0;
@@ -240,8 +241,9 @@ mraa_i2c_read_byte_data(mraa_i2c_context dev, uint8_t command)
 uint16_t
 mraa_i2c_read_word_data(mraa_i2c_context dev, uint8_t command)
 {
+    if (IS_FUNC_DEFINED(dev, i2c_read_word_data_replace))
+        return dev->advance_func->i2c_read_word_data_replace(dev, command);
     i2c_smbus_data_t d;
-
     if (mraa_i2c_smbus_access(dev->fh, I2C_SMBUS_READ, command, I2C_SMBUS_WORD_DATA, &d) < 0) {
         syslog(LOG_ERR, "i2c: Failed to write");
         return 0;
@@ -252,6 +254,8 @@ mraa_i2c_read_word_data(mraa_i2c_context dev, uint8_t command)
 int
 mraa_i2c_read_bytes_data(mraa_i2c_context dev, uint8_t command, uint8_t* data, int length)
 {
+    if (IS_FUNC_DEFINED(dev, i2c_read_bytes_data_replace))
+        return dev->advance_func->i2c_read_bytes_data_replace(dev, command, data, length);
     struct i2c_rdwr_ioctl_data d;
     struct i2c_msg m[2];
 
@@ -273,6 +277,8 @@ mraa_i2c_read_bytes_data(mraa_i2c_context dev, uint8_t command, uint8_t* data, i
 mraa_result_t
 mraa_i2c_write(mraa_i2c_context dev, const uint8_t* data, int length)
 {
+    if (IS_FUNC_DEFINED(dev, i2c_write_replace))
+        return dev->advance_func->i2c_write_replace(dev, data, length);
     i2c_smbus_data_t d;
     int i;
     uint8_t command = data[0];