diff --git a/drivers/i2c/helpers_test.go b/drivers/i2c/helpers_test.go
index 67e0dd1e..243258d0 100644
--- a/drivers/i2c/helpers_test.go
+++ b/drivers/i2c/helpers_test.go
@@ -36,7 +36,7 @@ func (t *i2cTestAdaptor) Close() error {
 	return nil
 }
 
-func (t *i2cTestAdaptor) ReadByte() (val uint8, err error) {
+func (t *i2cTestAdaptor) ReadByte() (val byte, err error) {
 	bytes := []byte{0}
 	bytesRead, err := t.i2cReadImpl(bytes)
 	if err != nil {
@@ -82,7 +82,7 @@ func (t *i2cTestAdaptor) ReadBlockData(_ uint8, b []byte) (n int, err error) {
 	return bytesRead, err
 }
 
-func (t *i2cTestAdaptor) WriteByte(val uint8) (err error) {
+func (t *i2cTestAdaptor) WriteByte(val byte) (err error) {
 	t.written = append(t.written, val)
 	bytes := []byte{val}
 	_, err = t.i2cWriteImpl(bytes)
diff --git a/drivers/i2c/i2c.go b/drivers/i2c/i2c.go
index 48775c44..ea656ffe 100644
--- a/drivers/i2c/i2c.go
+++ b/drivers/i2c/i2c.go
@@ -60,7 +60,7 @@ func (c *i2cConnection) Close() error {
 	return c.bus.Close()
 }
 
-func (c *i2cConnection) ReadByte() (val uint8, err error) {
+func (c *i2cConnection) ReadByte() (val byte, err error) {
 	if err := c.bus.SetAddress(c.address); err != nil {
 		return 0, err
 	}
@@ -88,7 +88,7 @@ func (c *i2cConnection) ReadBlockData(reg uint8, b []byte) (n int, err error) {
 	return c.bus.ReadBlockData(reg, b)
 }
 
-func (c *i2cConnection) WriteByte(val uint8) (err error) {
+func (c *i2cConnection) WriteByte(val byte) (err error) {
 	if err := c.bus.SetAddress(c.address); err != nil {
 		return err
 	}