diff --git a/doc/protocol.xml b/doc/protocol.xml
index e327bf66d..e6319fccc 100644
--- a/doc/protocol.xml
+++ b/doc/protocol.xml
@@ -240,6 +240,12 @@
                   <returnvalue>0 or 1</returnvalue>
                 </para>
               </listitem>
+              <listitem>
+                <para>
+                  <varname>random</varname>:
+                  <returnvalue>0 or 1</returnvalue>
+                </para>
+              </listitem>
               <listitem>
                <para>
                 <varname>single</varname>: