diff --git a/include/mbedtls/aria.h b/include/mbedtls/aria.h
index 5724308..69518ee 100644
--- a/include/mbedtls/aria.h
+++ b/include/mbedtls/aria.h
@@ -44,6 +44,8 @@
 
 #define MBEDTLS_ERR_ARIA_INVALID_KEY_LENGTH   -0x005C  /**< Invalid key length. */
 #define MBEDTLS_ERR_ARIA_INVALID_INPUT_LENGTH -0x005E  /**< Invalid data input length. */
+#define MBEDTLS_ERR_ARIA_FEATURE_UNAVAILABLE  -0x005A  /**< Feature not available. For example, an unsupported ARIA key size. */
+#define MBEDTLS_ERR_ARIA_HW_ACCEL_FAILED      -0x0058  /**< ARIA hardware accelerator failed. */
 
 #if !defined(MBEDTLS_ARIA_ALT)
 // Regular implementation