diff --git a/nest/route.h b/nest/route.h
index aa21596e..f180d5e3 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -294,12 +294,13 @@ typedef struct eattr {
 #define EAF_TYPE_MASK 0x0f		/* Mask with this to get type */
 #define EAF_TYPE_INT 0x01		/* 32-bit signed integer number */
 #define EAF_TYPE_OPAQUE 0x02		/* Opaque byte string (not filterable) */
-#define EAF_TYPE_IP_ADDRESS 0x04	/* IP address [FIXME: embed at least for IPv4?] */
-#define EAF_TYPE_AS_PATH 0x06		/* BGP AS path [FIXME: define storage layout] */
+#define EAF_TYPE_IP_ADDRESS 0x04	/* IP address */
+#define EAF_TYPE_ROUTER_ID 0x05		/* Router ID (IPv4 address) */
+#define EAF_TYPE_AS_PATH 0x06		/* BGP AS path (encoding per RFC 1771) */
 #define EAF_TYPE_INT_SET 0x0a		/* Set of integers (e.g., a community list) */
 #define EAF_TYPE_UNDEF 0x0f		/* `force undefined' entry */
 #define EAF_EMBEDDED 0x01		/* Data stored in eattr.u.data (part of type spec) */
-#define EAF_VAR_LENGTH 0x02		/* Attribute length is variable */
+#define EAF_VAR_LENGTH 0x02		/* Attribute length is variable (part of type spec) */
 #define EAF_TEMP 0x80			/* A temporary attribute (the one stored in the tmp attr list) */
 
 struct adata {