diff --git a/include/osmocom/core/gsmtap.h b/include/osmocom/core/gsmtap.h
index 69bd108..c1ac3ed 100644
--- a/include/osmocom/core/gsmtap.h
+++ b/include/osmocom/core/gsmtap.h
@@ -43,6 +43,7 @@
 #define GSMTAP_TYPE_UMTS_RLC_MAC	0x0b
 #define GSMTAP_TYPE_UMTS_RRC	0x0c
 #define GSMTAP_TYPE_LTE_RRC	0x0d	/* LTE interface */
+#define GSMTAP_TYPE_LTE_MAC	0x0e	/* LTE MAC interface */ 
 
 /* ====== DO NOT MAKE UNAPPROVED MODIFICATIONS HERE ===== */
 
@@ -219,6 +220,20 @@
 	GSMTAP_RRC_SUB_MAX
 };
 
+/* LTE RRC message types */
+enum {
+    GSMTAP_LTE_RRC_SUB_DL_CCCH_Message = 0,
+    GSMTAP_LTE_RRC_SUB_DL_DCCH_Message,
+    GSMTAP_LTE_RRC_SUB_UL_CCCH_Message,
+    GSMTAP_LTE_RRC_SUB_UL_DCCH_Message,
+    GSMTAP_LTE_RRC_SUB_BCCH_BCH_Message,
+    GSMTAP_LTE_RRC_SUB_BCCH_DL_SCH_Message,
+    GSMTAP_LTE_RRC_SUB_PCCH_Message,
+    GSMTAP_LTE_RRC_SUB_MCCH_Message,
+
+    GSMTAP_LTE_RRC_SUB_MAX
+};
+
 /* ====== DO NOT MAKE UNAPPROVED MODIFICATIONS HERE ===== */
 struct gsmtap_hdr {
 	uint8_t version;	/* version, set to 0x01 currently */