diff --git a/include/polarssl/hmac_drbg.h b/include/polarssl/hmac_drbg.h
index 4b8e11bb0a..b42a2fb8bd 100644
--- a/include/polarssl/hmac_drbg.h
+++ b/include/polarssl/hmac_drbg.h
@@ -191,8 +191,9 @@ int hmac_drbg_reseed( hmac_drbg_context *ctx,
  * \param add_len       Length of additional data (can be 0)
  *
  * \return              0 if successful, or
- *                      TODO: POLARSSL_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED, or
- *                      TODO: POLARSSL_ERR_HMAC_DRBG_REQUEST_TOO_BIG
+ *                      POLARSSL_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED, or
+ *                      POLARSSL_ERR_HMAC_DRBG_REQUEST_TOO_BIG, or
+ *                      POLARSSL_ERR_HMAC_DRBG_INPUT_TOO_BIG.
  */
 int hmac_drbg_random_with_add( void *p_rng,
                                unsigned char *output, size_t output_len,
@@ -206,11 +207,11 @@ int hmac_drbg_random_with_add( void *p_rng,
  *
  * \param p_rng         HMAC_DRBG context
  * \param output        Buffer to fill
- * \param output_len    Length of the buffer
+ * \param out_len       Length of the buffer
  *
  * \return              0 if successful, or
- *                      TODO: POLARSSL_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED, or
- *                      TODO: POLARSSL_ERR_HMAC_DRBG_REQUEST_TOO_BIG
+ *                      POLARSSL_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED, or
+ *                      POLARSSL_ERR_HMAC_DRBG_REQUEST_TOO_BIG
  */
 int hmac_drbg_random( void *p_rng, unsigned char *output, size_t out_len );