diff --git a/dvb_support.h b/dvb_support.h
index 4fba114a..1a095c5a 100644
--- a/dvb_support.h
+++ b/dvb_support.h
@@ -26,6 +26,7 @@
 #ifndef DVB_SUPPORT_H
 #define DVB_SUPPORT_H
 
+#define DVB_DESC_CA           0x09
 
 /* Descriptors defined in EN 300 468 */