diff --git a/src/measure.c b/src/measure.c
index c4f2a17..835049b 100644
--- a/src/measure.c
+++ b/src/measure.c
@@ -87,7 +87,8 @@ void measure_parse(struct measure_params* mp, struct measure_state* ms, uint8_t
   micro_sec = elapsed_micros (&ms->mp_in->emit_time, &curr);
 
   if (ms->mp_in->counter <= mp->max_measure && !ms->mp_in->probe) {
-    ms->log[ms->mp_in->counter-1] = micro_sec;
+    // we log only the delay of the first received packet, the fastest
+    if (ms->log[ms->mp_in->counter-1] == 0) ms->log[ms->mp_in->counter-1] = micro_sec;
   } else {
     verbose = 1;
     fprintf(stderr, "measure will be ignored: probe=%d, counter=%lu, max_measure=%lu\n", ms->mp_in->probe, ms->mp_in->counter, mp->max_measure);