diff --git a/reference/openssl/functions/openssl-pkcs7-sign.xml b/reference/openssl/functions/openssl-pkcs7-sign.xml
index 1145c5e70a..86fafef8cd 100644
--- a/reference/openssl/functions/openssl-pkcs7-sign.xml
+++ b/reference/openssl/functions/openssl-pkcs7-sign.xml
@@ -35,6 +35,7 @@
      <term><parameter>infilename</parameter></term>
      <listitem>
       <para>
+        The input file you are intending to digitally sign.
       </para>
      </listitem>
     </varlistentry>
@@ -42,6 +43,7 @@
      <term><parameter>outfilename</parameter></term>
      <listitem>
       <para>
+        The file which the digital signature will be written to.
       </para>
      </listitem>
     </varlistentry>
@@ -49,6 +51,8 @@
      <term><parameter>signcert</parameter></term>
      <listitem>
       <para>
+        The X.509 certificate used to digitally sign infilename - 
+        see <link linkend="openssl.certparams">key/cert params</link>.
       </para>
      </listitem>
     </varlistentry>
@@ -56,6 +60,8 @@
      <term><parameter>privkey</parameter></term>
      <listitem>
       <para>
+        <parameter>privkey</parameter> is the private key corresponding to signcert -
+        see <link linkend="openssl.certparams">key/cert params</link>.
       </para>
      </listitem>
     </varlistentry>