diff --git a/include/osmocom/core/gsmtap.h b/include/osmocom/core/gsmtap.h
index 7a14ba9..b4239f8 100644
--- a/include/osmocom/core/gsmtap.h
+++ b/include/osmocom/core/gsmtap.h
@@ -112,6 +112,11 @@
 #define GSMTAP_TETRA_BNCH	0x06
 #define GSMTAP_TETRA_STCH	0x07
 #define GSMTAP_TETRA_TCH_F	0x08
+#define GSMTAP_TETRA_DMO_SCH_S	0x09
+#define GSMTAP_TETRA_DMO_SCH_H	0x0a
+#define GSMTAP_TETRA_DMO_SCH_F	0x0b
+#define GSMTAP_TETRA_DMO_STCH	0x0c
+#define GSMTAP_TETRA_DMO_TCH	0x0d
 
 /* ====== DO NOT MAKE UNAPPROVED MODIFICATIONS HERE ===== */