diff --git a/Documentation/DocBook/media/dvb/dvbproperty.xml b/Documentation/DocBook/media/dvb/dvbproperty.xml
index b812e3140fcb..ffee1fbbc001 100644
--- a/Documentation/DocBook/media/dvb/dvbproperty.xml
+++ b/Documentation/DocBook/media/dvb/dvbproperty.xml
@@ -311,8 +311,6 @@ typedef enum fe_rolloff {
 	ROLLOFF_20,
 	ROLLOFF_25,
 	ROLLOFF_AUTO,
-	ROLLOFF_15, /* DVB-C Annex A */
-	ROLLOFF_13, /* DVB-C Annex C */
 } fe_rolloff_t;
 		</programlisting>
 		</section>
@@ -336,9 +334,10 @@ typedef enum fe_rolloff {
 		<title>fe_delivery_system type</title>
 		<para>Possible values: </para>
 <programlisting>
+
 typedef enum fe_delivery_system {
 	SYS_UNDEFINED,
-	SYS_DVBC_ANNEX_AC,
+	SYS_DVBC_ANNEX_A,
 	SYS_DVBC_ANNEX_B,
 	SYS_DVBT,
 	SYS_DSS,
@@ -355,6 +354,7 @@ typedef enum fe_delivery_system {
 	SYS_DAB,
 	SYS_DVBT2,
 	SYS_TURBO,
+	SYS_DVBC_ANNEX_C,
 } fe_delivery_system_t;
 </programlisting>
 		</section>
@@ -781,7 +781,8 @@ typedef enum fe_hierarchy {
 	<title>Properties used on cable delivery systems</title>
 	<section id="dvbc-params">
 		<title>DVB-C delivery system</title>
-		<para>The DVB-C Annex-A/C is the widely used cable standard. Transmission uses QAM modulation.</para>
+		<para>The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.</para>
+		<para>The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It supports a subset of the Annex A modulation types, and a roll-off of 0.13, instead of 0.15</para>
 		<para>The following parameters are valid for DVB-C Annex A/C:</para>
 		<itemizedlist mark='opencircle'>
 			<listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
@@ -792,10 +793,8 @@ typedef enum fe_hierarchy {
 			<listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
 			<listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
 			<listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
-			<listitem><para><link linkend="DTV-ROLLOFF"><constant>DTV_ROLLOFF</constant></link></para></listitem>
 			<listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
 		</itemizedlist>
-		<para>The Rolloff of 0.15 (ROLLOFF_15) is assumed, as ITU-T J.83 Annex A is more common. For Annex C, rolloff should be 0.13 (ROLLOFF_13). All other values are invalid.</para>
 	</section>
 	<section id="dvbc-annex-b-params">
 		<title>DVB-C Annex B delivery system</title>
diff --git a/Documentation/DocBook/media/dvb/frontend.xml b/Documentation/DocBook/media/dvb/frontend.xml
index 61407eaba020..28d7ea5d5e73 100644
--- a/Documentation/DocBook/media/dvb/frontend.xml
+++ b/Documentation/DocBook/media/dvb/frontend.xml
@@ -45,8 +45,8 @@ transmission. The fontend types are given by fe_type_t type, defined as:</para>
   </row>
   <row>
      <entry id="FE_QAM"><constant>FE_QAM</constant></entry>
-     <entry>For DVB-C annex A/C standard</entry>
-     <entry><constant>SYS_DVBC_ANNEX_AC</constant></entry>
+     <entry>For DVB-C annex A standard</entry>
+     <entry><constant>SYS_DVBC_ANNEX_A</constant></entry>
   </row>
   <row>
      <entry id="FE_OFDM"><constant>FE_OFDM</constant></entry>