diff --git a/isisd/isis_circuit.h b/isisd/isis_circuit.h
index 354a06b..343b492 100644
--- a/isisd/isis_circuit.h
+++ b/isisd/isis_circuit.h
@@ -24,6 +24,10 @@
 #define ISIS_CIRCUIT_H
 
 #include "vty.h"
+#include "if.h"
+
+#include "isis_constants.h"
+#include "isis_common.h"
 
 #define CIRCUIT_MAX 255
 
@@ -168,4 +172,12 @@
 size_t isis_circuit_pdu_size(struct isis_circuit *circuit);
 void isis_circuit_stream(struct isis_circuit *circuit, struct stream **stream);
 
+struct isis_circuit *isis_circuit_create (struct isis_area *area, struct interface *ifp);
+void isis_circuit_af_set (struct isis_circuit *circuit, bool ip_router, bool ipv6_router);
+int  isis_circuit_passive_set (struct isis_circuit *circuit, bool passive);
+void isis_circuit_is_type_set (struct isis_circuit *circuit, int is_type);
+int  isis_circuit_circ_type_set (struct isis_circuit *circuit, int circ_type);
+
+int  isis_circuit_metric_set (struct isis_circuit *circuit, int level, int metric);
+
 #endif /* _ZEBRA_ISIS_CIRCUIT_H */