diff --git a/bacnet-stack/demo/mstpcap/main.c b/bacnet-stack/demo/mstpcap/main.c
index bba1baa1..e361e02d 100644
--- a/bacnet-stack/demo/mstpcap/main.c
+++ b/bacnet-stack/demo/mstpcap/main.c
@@ -823,7 +823,7 @@ int main(
             if (test_global_header(argv[2])) {
                 while (read_received_packet(mstp_port)) {
                     packet_count++;
-                    fprintf(stdout, "\r%hu packets", packet_count);
+                    fprintf(stderr, "\r%hu packets", packet_count);
                 }
                 if (packet_count) {
                     packet_statistics_print();