diff --git a/ChangeLog b/ChangeLog
index 3432118..20f7e5a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -18,6 +18,8 @@
      program programs/x509/cert_write. Fixes #1422.
    * Ignore iv in mbedtls_cipher_set_iv() when the cipher mode is MBEDTLS_MODE_ECB
      Fix for #1091 raised by ezdevelop
+   * Clarify documentation of mbedtls_ssl_set_own_cert() regarding the absence
+     of check for certificate/key matching. Reported by Attila Molnar, #507.
 
 Changes
    * Add tests for session resumption in DTLS.
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index c6e4532..02d66ac 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -1618,6 +1618,14 @@
  *                 whether it matches those preferences - the server can then
  *                 decide what it wants to do with it.
  *
+ * \note           The provided \p pk_key needs to match the public key in the
+ *                 first certificate in \p own_cert, or all handshakes using
+ *                 that certificate will fail. It is your responsibility
+ *                 to ensure that; this function will not perform any check.
+ *                 You may use mbedtls_pk_check_pair() in order to perform
+ *                 this check yourself, but be aware that this function can
+ *                 be computationally expensive on some key types.
+ *
  * \param conf     SSL configuration
  * \param own_cert own public certificate chain
  * \param pk_key   own private key