diff --git a/include/osmocom/core/gsmtap.h b/include/osmocom/core/gsmtap.h
index 236b25a..ffcd3a4 100644
--- a/include/osmocom/core/gsmtap.h
+++ b/include/osmocom/core/gsmtap.h
@@ -47,6 +47,10 @@
 #define GSMTAP_CHANNEL_SDCCH8	0x08
 #define GSMTAP_CHANNEL_TCH_F	0x09
 #define GSMTAP_CHANNEL_TCH_H	0x0a
+#define GSMTAP_CHANNEL_CBCH51	0x0b
+#define GSMTAP_CHANNEL_CBCH52	0x0c
+#define GSMTAP_CHANNEL_PDCH	0x0d
+#define GSMTAP_CHANNEL_PTCCH	0x0e
 #define GSMTAP_CHANNEL_ACCH	0x80
 
 /* sub-types for TYPE_TETRA_AIR */