diff --git a/src/or/circuitlist.c b/src/or/circuitlist.c
index 9850ca67ce..aadaa9fef9 100644
--- a/src/or/circuitlist.c
+++ b/src/or/circuitlist.c
@@ -385,7 +385,9 @@ circuit_t *
 circuit_get_by_edge_conn(connection_t *conn)
 {
   circuit_t *circ;
+#if 0
   connection_t *tmpconn;
+#endif
   tor_assert(CONN_IS_EDGE(conn));
 
   if (! conn->on_circuit) {