diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 98df7c5..db38e81 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -2735,11 +2735,23 @@
  *
  * Module:  library/crc.c
  *
- * This module enables mbedtls_crc_update.
+ * This module enables mbedtls_crc_update().
  */
 //#define MBEDTLS_CRC_C
 
 /**
+ * \def MBEDTLS_VALIDATE_AES_KEYS_INTEGRITY
+ *
+ * Enable validation of AES keys by checking their CRC
+ * during every encryption/decryption.
+ *
+ * Module:  library/aes.c
+ *
+ * Requires: MBEDTLS_CRC_C
+ */
+//#define MBEDTLS_VALIDATE_AES_KEYS_INTEGRITY
+
+/**
  * \def MBEDTLS_GCM_C
  *
  * Enable the Galois/Counter Mode (GCM) for AES.