diff --git a/src/main.c b/src/main.c
index 64ee345..bcff0bc 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,5 +1,6 @@
 #include "dns.h"
 #include "host.h"
+#include "interval.h"
 #include "packet.h"
 #include "print.h"
 #include "setting.h"
@@ -160,7 +161,9 @@ int main(int ac, char **av)
             print_recv(&settings, buffer, &start, &stop, &sender);
         }
 
-        sleep(1);
+        double interval = get_interval(&start, &stop);
+        if (interval < 1000)
+            usleep((1000 - interval) * 1e3);
 
         if (packet_update(packet, settings.payload_size))
             goto error3;