--- a/src/test/rgw/amqp_mock.cc
+++ b/src/test/rgw/amqp_mock.cc
@@ -291,7 +291,11 @@ amqp_confirm_select_ok_t* amqp_confirm_select(amqp_connection_state_t state, amq
   return state->confirm;
 }
 
-int amqp_simple_wait_frame_noblock(amqp_connection_state_t state, amqp_frame_t *decoded_frame, struct timeval* tv) {
+extern "C" {
+
+int amqp_simple_wait_frame_noblock(amqp_connection_state_t state,
+                                   amqp_frame_t *decoded_frame,
+                                   const struct timeval* tv) {
   if (state->socket && state->socket->open_called &&
       state->login_called && state->channel1 && state->channel2 && state->exchange &&
       state->queue && state->consume && state->confirm && !FAIL_NEXT_READ) {
@@ -345,6 +349,7 @@ int amqp_simple_wait_frame_noblock(amqp_connection_state_t state, amqp_frame_t *
   }
   return AMQP_STATUS_CONNECTION_CLOSED;
 }
+} // extern "C"
 
 amqp_basic_consume_ok_t* amqp_basic_consume(
     amqp_connection_state_t state, amqp_channel_t channel, amqp_bytes_t queue,