diff --git a/modules/acc/README b/modules/acc/README
index 59d9b338456..2c742ee181c 100644
--- a/modules/acc/README
+++ b/modules/acc/README
@@ -134,6 +134,7 @@ Sven Knoblich
               6.51. time_format (str)
               6.52. reason_from_hf (int)
               6.53. clone_msg (int)
+              6.54. cdr_on_failed (int)
 
         7. Functions
 
@@ -199,10 +200,11 @@ Sven Knoblich
    1.51. time_format example
    1.52. reason_from_hf
    1.53. clone_msg
-   1.54. acc_log_request usage
-   1.55. acc_db_request usage
-   1.56. acc_rad_request usage
-   1.57. acc_diam_request usage
+   1.54. cdr_on_failed
+   1.55. acc_log_request usage
+   1.56. acc_db_request usage
+   1.57. acc_rad_request usage
+   1.58. acc_diam_request usage
 
 Chapter 1. Admin Guide
 
@@ -300,6 +302,7 @@ Chapter 1. Admin Guide
         6.51. time_format (str)
         6.52. reason_from_hf (int)
         6.53. clone_msg (int)
+        6.54. cdr_on_failed (int)
 
    7. Functions
 
@@ -721,6 +724,7 @@ $dlg_var(callee) = $avp(callee); #callee='C'
    6.51. time_format (str)
    6.52. reason_from_hf (int)
    6.53. clone_msg (int)
+   6.54. cdr_on_failed (int)
 
 6.1. early_media (integer)
 
@@ -1406,6 +1410,19 @@ modparam("acc", "reason_from_hf", 1)
 modparam("acc", "clone_msg", 0)
 ...
 
+6.54. cdr_on_failed (int)
+
+   If set to 1, the module stores the CDR for a failed dialog (calls not
+   answered). If set to 0, those records are not stored, only those for
+   answered calls.
+
+   Default value is 1.
+
+   Example 1.54. cdr_on_failed
+...
+modparam("acc", "cdr_on_failed", 0)
+...
+
 7. Functions
 
    7.1. acc_log_request(comment)
@@ -1426,7 +1443,7 @@ modparam("acc", "clone_msg", 0)
 
    This function can be used from ANY_ROUTE.
 
-   Example 1.54. acc_log_request usage
+   Example 1.55. acc_log_request usage
 ...
 acc_log_request("Some comment");
 $var(code) = 404;
@@ -1448,7 +1465,7 @@ acc_log_request("$var(code) Error: $avp(reason)");
 
    This function can be used from ANY_ROUTE.
 
-   Example 1.55. acc_db_request usage
+   Example 1.56. acc_db_request usage
 ...
 acc_db_request("Some comment", "SomeTable");
 acc_db_request("Some comment", "acc_$time(year)_$time(mon)");
@@ -1466,7 +1483,7 @@ acc_db_request("$var(code) Error: $avp(reason)", "SomeTable");
 
    This function can be used from ANY_ROUTE.
 
-   Example 1.56. acc_rad_request usage
+   Example 1.57. acc_rad_request usage
 ...
 acc_rad_request("Some comment");
 acc_rad_request("$var(code) Error: $avp(reason)");
@@ -1483,7 +1500,7 @@ acc_rad_request("$var(code) Error: $avp(reason)");
 
    This function can be used from ANY_ROUTE.
 
-   Example 1.57. acc_diam_request usage
+   Example 1.58. acc_diam_request usage
 ...
 acc_diam_request("Some comment");
 acc_diam_request("$var(code) Error: $avp(reason)");
diff --git a/modules/acc/doc/acc_admin.xml b/modules/acc/doc/acc_admin.xml
index 427b27452a0..820f480fd42 100644
--- a/modules/acc/doc/acc_admin.xml
+++ b/modules/acc/doc/acc_admin.xml
@@ -390,7 +390,7 @@ if (uri=~"sip:+40") /* calls to Romania */ {
 			<section>
 				<title>Overview</title>
 				<para>
-				As mentioned in <xref linkend="multi-call-legs"/>, a leg represents a parallel
+				As mentioned in <xref linkend="acc.i.multi-call-legs"/>, a leg represents a parallel
 				or forwarded call. In contrast to the normal accounting the cdr logging uses dialogs
 				instead of transaction to log data. This may reduce the amount of information 
 				but it also make it possible to combine all important data in one cdr at 
@@ -642,7 +642,7 @@ modparam("acc", "acc_prepare_flag", 5)
 		<title><varname>multi_leg_info</varname> (string)</title>
 		<para>
 		Defines the AVP set to be used in per-call-leg accounting.
-		See <xref linkend="multi-call-legs"/> for a 
+		See <xref linkend="acc.i.multi-call-legs"/> for a 
 		detailed description of the Multi Call-Legs accounting.
 		</para>
 		<para>
@@ -1539,6 +1539,25 @@ modparam("acc", "reason_from_hf", 1)
 ...
 modparam("acc", "clone_msg", 0)
 ...
+</programlisting>
+		</example>
+	</section>
+	<section id="acc.p.cdr_on_failed">
+		<title><varname>cdr_on_failed</varname> (int)</title>
+		<para>
+		If set to 1, the module stores the CDR for a failed dialog (calls not
+		answered). If set to 0, those records are not stored, only those for
+		answered calls.
+		</para>
+		<para>
+		Default value is 1.
+		</para>
+		<example>
+		<title>cdr_on_failed</title>
+		<programlisting format="linespecific">
+...
+modparam("acc", "cdr_on_failed", 0)
+...
 </programlisting>
 		</example>
 	</section>