diff --git a/include/etl/crc8_j1850.h b/include/etl/crc8_j1850.h
index 3e59a75c4..723a29528 100644
--- a/include/etl/crc8_j1850.h
+++ b/include/etl/crc8_j1850.h
@@ -28,8 +28,8 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 ******************************************************************************/
 
-#ifndef ETL_CRC8_CDMA2000_INCLUDED
-#define ETL_CRC8_CDMA2000_INCLUDED
+#ifndef ETL_CRC8_J1850_INCLUDED
+#define ETL_CRC8_J1850_INCLUDED
 
 #include "platform.h"
 #include "private/crc_implementation.h"
diff --git a/include/etl/crc8_j1850_zero.h b/include/etl/crc8_j1850_zero.h
index 1c9823b31..04bd7b556 100644
--- a/include/etl/crc8_j1850_zero.h
+++ b/include/etl/crc8_j1850_zero.h
@@ -28,8 +28,8 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 ******************************************************************************/
 
-#ifndef ETL_CRC8_CDMA2000_INCLUDED
-#define ETL_CRC8_CDMA2000_INCLUDED
+#ifndef ETL_CRC8_J1850_ZERO_INCLUDED
+#define ETL_CRC8_J1850_ZERO_INCLUDED
 
 #include "platform.h"
 #include "private/crc_implementation.h"