diff --git a/src/modules/dialog/doc/dialog_admin.xml b/src/modules/dialog/doc/dialog_admin.xml
index 3a5a348abce..d231d9a2f6d 100644
--- a/src/modules/dialog/doc/dialog_admin.xml
+++ b/src/modules/dialog/doc/dialog_admin.xml
@@ -1520,6 +1520,60 @@ end
 		</example>
 	</section>
 
+	<section id="dialog.p.h_id_start">
+		<title><varname>h_id_start</varname> (int)</title>
+		<para>
+			Set the offset to be used for generating dialog internal hash id.
+			If set to -1, the h_id_start is set to the value of the server_id
+			global parameter.
+		</para>
+		<para>
+		<emphasis>
+			Default value is <quote>0</quote>.
+		</emphasis>
+		</para>
+		<example>
+		<title>Set <varname>h_id_start</varname> parameter</title>
+		<programlisting format="linespecific">
+...
+modparam("dialog", "h_id_start", 5)
+...
+</programlisting>
+		</example>
+	</section>
+
+	<section id="dialog.p.h_id_step">
+		<title><varname>h_id_step</varname> (int)</title>
+		<para>
+			Set the step to increment the dialog internal hash id.
+		</para>
+		<para>
+			If the value is greater than 1, the internal hash id is generated
+			with the rule: h_id_start + N * h_id_step. The first value of N is
+			randomly selected at startup, then incremented by 1 for each new
+			dialog. Setting h_id_start and h_id_step to non-default values
+			should be done when using dlg_db_load_callid(...) to load dialog
+			records generated by another &kamailio; instance, making also sure
+			that those &kamailio; instances are not going to generate
+			overalapping dialog hash id values by using different h_id_start
+			and the same h_id_step (h_id_step has to be greater than the
+			maximum value of h_id_start).
+		</para>
+		<para>
+		<emphasis>
+			Default value is <quote>1</quote>.
+		</emphasis>
+		</para>
+		<example>
+		<title>Set <varname>h_id_step</varname> parameter</title>
+		<programlisting format="linespecific">
+...
+modparam("dialog", "h_id_step", 10)
+...
+</programlisting>
+		</example>
+	</section>
+
 	</section>