Style and grammar fixes
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 720c338..582be2c 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -1490,13 +1490,13 @@
* \param f_async_sign Callback to start a signature operation. See
* the description of \c mbedtls_ssl_async_sign_t
* for more information. This may be NULL if the
- * external processor does no support any signature
+ * external processor does not support any signature
* operation; in this case the private key object
* associated with the certificate will be used.
* \param f_async_decrypt Callback to start a decryption operation. See
* the description of \c mbedtls_ssl_async_decrypt_t
* for more information. This may be NULL if the
- * external processor does no support any decryption
+ * external processor does not support any decryption
* operation; in this case the private key object
* associated with the certificate will be used.
* \param f_async_resume Callback to resume an asynchronous operation. See