diff --git a/dvb/dvb.h b/dvb/dvb.h
index bed59d1..e3877c7 100644
--- a/dvb/dvb.h
+++ b/dvb/dvb.h
@@ -22,9 +22,12 @@
 #define LIBMPEGTS_DVB_H
 
 /* Descriptor Tags */
-#define STREAM_IDENTIFIER_DESCRIPTOR_TAG 0x52
+#define DVB_SERVICE_DESCRIPTOR_TAG  0x48
+#define DVB_STREAM_IDENTIFIER_DESCRIPTOR_TAG 0x52
+#define DVB_TELETEXT_DESCRIPTOR_TAG 0x56
 #define DVB_AC3_DESCRIPTOR_TAG  0x6a
 #define DVB_EAC3_DESCRIPTOR_TAG 0x7a
+#define DVB_AAC_DESCRIPTOR_TAG  0x7c
 
 /* PIDs */
 #define SDT_PID         0x0011