--- a/src/iperf_api.c
+++ b/src/iperf_api.c
@@ -4137,7 +4137,7 @@ iperf_print_results(struct iperf_test *test)
                                 iperf_printf(test, report_sender_not_available_summary_format, "SUM");
                         }
                         else {
-                          iperf_printf(test, report_sum_bw_retrans_format, mbuf, start_time, sender_time, ubuf, nbuf, total_retransmits, report_sender);
+                          iperf_printf(test, report_sum_bw_retrans_format, mbuf, start_time, sender_time, ubuf, nbuf, (int)total_retransmits, report_sender);
                         }
                 } else {
                     /* Summary sum, TCP without retransmits. */