diff --git a/inc/at_device.h b/inc/at_device.h
index 5f72070..4b98044 100644
--- a/inc/at_device.h
+++ b/inc/at_device.h
@@ -54,7 +54,7 @@ extern "C" {
 #define AT_DEVICE_CLASS_ESP32          0x08U
 #define AT_DEVICE_CLASS_W60X           0x09U
 #define AT_DEVICE_CLASS_A9G            0x0AU
-#define AT_DEVICE_CLASS_AIR720         0x0BU
+#define AT_DEVICE_CLASS_AIR720         0x0CU
 
 /* Options and Commands for AT device control opreations */
 #define AT_DEVICE_CTRL_POWER_ON        0x01L