diff --git a/rtt.c b/rtt.c
index e06343d..3c41e38 100644
--- a/rtt.c
+++ b/rtt.c
@@ -54,8 +54,10 @@ int rtt(int *seqp, int recvport, float *ms_delay)
 		status = delaytable[tablepos].status;
 		delaytable[tablepos].status = S_RECV;
 
-		sec_delay = time(NULL) - delaytable[tablepos].sec;
-		usec_delay = get_usec() - delaytable[tablepos].usec;
+		struct timeval tv;
+		gettimeofday(&tv, NULL);
+		sec_delay = tv.tv_sec - delaytable[tablepos].sec;
+		usec_delay = tv.tv_usec - delaytable[tablepos].usec;
 		if (sec_delay == 0 && usec_delay < 0)
 			usec_delay += 1000000;
 
diff --git a/sendicmp.c b/sendicmp.c
index 7efb274..ca3ba2f 100644
--- a/sendicmp.c
+++ b/sendicmp.c
@@ -96,8 +96,11 @@ void send_icmp_echo(void)
 		icmp->checksum = icmp_cksum;
 
 	/* adds this pkt in delaytable */
-	if (opt_icmptype == ICMP_ECHO)
-		delaytable_add(_icmp_seq, 0, time(NULL), get_usec(), S_SENT);
+	if (opt_icmptype == ICMP_ECHO) {
+		struct timeval tv;
+		gettimeofday(&tv, NULL);
+		delaytable_add(_icmp_seq, 0, tv.tv_sec, tv.tv_usec, S_SENT);
+	}
 
 	/* send packet */
 	send_ip_handler(packet, ICMPHDR_SIZE + data_size);
@@ -140,8 +143,11 @@ void send_icmp_timestamp(void)
 		icmp->checksum = icmp_cksum;
 
 	/* adds this pkt in delaytable */
-	if (opt_icmptype == ICMP_TIMESTAMP)
-		delaytable_add(_icmp_seq, 0, time(NULL), get_usec(), S_SENT);
+	if (opt_icmptype == ICMP_TIMESTAMP) {
+		struct timeval tv;
+		gettimeofday(&tv, NULL);
+		delaytable_add(_icmp_seq, 0, tv.tv_sec, tv.tv_usec, S_SENT);
+	}
 
 	/* send packet */
 	send_ip_handler(packet, ICMPHDR_SIZE + sizeof(struct icmp_tstamp_data));
@@ -180,8 +186,11 @@ void send_icmp_address(void)
 		icmp->checksum = icmp_cksum;
 
 	/* adds this pkt in delaytable */
-	if (opt_icmptype == ICMP_TIMESTAMP)
-		delaytable_add(_icmp_seq, 0, time(NULL), get_usec(), S_SENT);
+	if (opt_icmptype == ICMP_TIMESTAMP) {
+		struct timeval tv;
+		gettimeofday(&tv, NULL);
+		delaytable_add(_icmp_seq, 0, tv.tv_sec, tv.tv_usec, S_SENT);
+	}
 
 	/* send packet */
 	send_ip_handler(packet, ICMPHDR_SIZE + 4);
diff --git a/sendtcp.c b/sendtcp.c
index 6765ad4..d2a46fc 100644
--- a/sendtcp.c
+++ b/sendtcp.c
@@ -86,7 +86,9 @@ void send_tcp(void)
 #endif
 
 	/* adds this pkt in delaytable */
-	delaytable_add(sequence, src_port, time(NULL), get_usec(), S_SENT);
+	struct timeval tv;
+	gettimeofday(&tv, NULL);
+	delaytable_add(sequence, src_port, tv.tv_sec, tv.tv_usec, S_SENT);
 
 	/* send packet */
 	send_ip_handler(packet+PSEUDOHDR_SIZE, packet_size);
diff --git a/sendudp.c b/sendudp.c
index 6da7cd2..0d2440c 100644
--- a/sendudp.c
+++ b/sendudp.c
@@ -65,7 +65,9 @@ void send_udp(void)
 #endif
 
 	/* adds this pkt in delaytable */
-	delaytable_add(sequence, src_port, time(NULL), get_usec(), S_SENT);
+	struct timeval tv;
+	gettimeofday(&tv, NULL);
+	delaytable_add(sequence, src_port, tv.tv_sec, tv.tv_usec, S_SENT);
 
 	/* send packet */
 	send_ip_handler(packet+PSEUDOHDR_SIZE, packet_size);