diff --git a/src/or/circuitbuild.h b/src/or/circuitbuild.h
index 7083db12fbd16723936707048af95776425c5004..55a7c723d0c36cd083b16ac17715bce5f37bd121 100644
--- a/src/or/circuitbuild.h
+++ b/src/or/circuitbuild.h
@@ -137,8 +137,6 @@ const char *find_transport_name_by_bridge_addrport(const tor_addr_t *addr,
 struct transport_t;
 int find_transport_by_bridge_addrport(const tor_addr_t *addr, uint16_t port,
                                       const struct transport_t **transport);
-const char *find_transport_name_by_bridge_addrport(const tor_addr_t *addr,
-                                                   uint16_t port);
 
 int validate_pluggable_transports_config(void);