The tp_meter output for raw bytes is not casting the values to float. It must therefore use PRIu64 to print the results. Reported-by: Simon Wunderlich &lt;sw(a)simonwunderlich.de&gt; Signed-off-by: Sven Eckelmann &lt;sven(a)narfation.org&gt; --- tp_meter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tp_meter.c b/tp_meter.c index d980ebd..43c19da 100644 --- a/tp_meter.c +++ b/tp_meter.c @@ -524,8 +524,8 @@ int tp_meter(char *mesh_iface, int argc, char **argv) (float)throughput / (1<<10), (float)throughput * 8 / 1000); else - printf("%lu Bytes/s (%lu Bps)\n", - throughput, throughput * 8); + printf("%" PRIu64 " Bytes/s (%" PRIu64 " Bps)\n", + throughput, throughput * 8); ret = 0; break; -- 2.8.1