diff --git a/isisd/isis_circuit.h b/isisd/isis_circuit.h
index d86fee0..d883879 100644
--- a/isisd/isis_circuit.h
+++ b/isisd/isis_circuit.h
@@ -164,5 +164,7 @@
 void circuit_update_nlpids (struct isis_circuit *circuit);
 void isis_circuit_print_vty (struct isis_circuit *circuit, struct vty *vty,
                              char detail);
+size_t isis_circuit_pdu_size(struct isis_circuit *circuit);
+void isis_circuit_stream(struct isis_circuit *circuit, struct stream **stream);
 
 #endif /* _ZEBRA_ISIS_CIRCUIT_H */