1 files changed, 2 insertions, 1 deletions
diff --git a/src/or/relay.h b/src/or/relay.h
index 969c6fb61d..68b4fdf197 100644
--- a/src/or/relay.h
+++ b/src/or/relay.h
@@ -64,7 +64,8 @@ void append_cell_to_circuit_queue(circuit_t *circ, channel_t *chan,
                                   cell_t *cell, cell_direction_t direction,
                                   streamid_t fromstream);
 void channel_unlink_all_circuits(channel_t *chan, smartlist_t *detached_out);
-int channel_flush_from_first_active_circuit(channel_t *chan, int max);
+MOCK_DECL(int, channel_flush_from_first_active_circuit,
+          (channel_t *chan, int max));
 void assert_circuit_mux_okay(channel_t *chan);
 void update_circuit_on_cmux_(circuit_t *circ, cell_direction_t direction,
                              const char *file, int lineno);