diff --git a/include/mbedtls/aes.h b/include/mbedtls/aes.h
index 46016dc..d252930 100644
--- a/include/mbedtls/aes.h
+++ b/include/mbedtls/aes.h
@@ -49,6 +49,7 @@
 /* Error codes in range 0x0020-0x0022 */
 #define MBEDTLS_ERR_AES_INVALID_KEY_LENGTH                -0x0020  /**< Invalid key length. */
 #define MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH              -0x0022  /**< Invalid data input length. */
+#define MBEDTLS_ERR_AES_BAD_INPUT_DATA                    -0x0024  /**< Invalid input data. */
 
 /* Error codes in range 0x0023-0x0025 */
 #define MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE               -0x0023  /**< Feature not available. For example, an unsupported AES key size. */