diff --git a/reference/openssl/functions/openssl-sign.xml b/reference/openssl/functions/openssl-sign.xml
index 3581d0091737..d86160ff3a29 100644
--- a/reference/openssl/functions/openssl-sign.xml
+++ b/reference/openssl/functions/openssl-sign.xml
@@ -71,7 +71,10 @@
     <varlistentry>
      <term><parameter>padding</parameter></term>
      <listitem>
-      <simpara>RSA PSS padding to use.</simpara>
+      <para>
+       <parameter>padding</parameter> only supports one option:
+       <constant>OPENSSL_PKCS1_PSS_PADDING</constant>.
+      </para>
      </listitem>
     </varlistentry>
    </variablelist>