diff --git a/Makefile b/Makefile
index 0245f58..6b03bff 100644
--- a/Makefile
+++ b/Makefile
@@ -33,7 +33,7 @@ endif
 all: $(NAME)
 
 $(NAME): $(OBJS)
-	@$(CC) $(FLAGS) $(OBJS) -o $(NAME)
+	@$(CC) $(FLAGS) -lm $(OBJS) -o $(NAME)
 	@printf "$(YELLOW)「✨」($(NAME)) Program compiled\n"
 
 $(OBJSDIR)/%.o: $(SRCDIR)/%.c
diff --git a/src/ping/send_icmp.c b/src/ping/send_icmp.c
index a031bfb..bbe7563 100644
--- a/src/ping/send_icmp.c
+++ b/src/ping/send_icmp.c
@@ -61,7 +61,6 @@ void process_icmp(char *buf, int bytes, struct sockaddr_in *addr, int seq,
 
 		append_time(rtt);
 
-		// TODO: fix the time and put the hostname with the ip
 		printf("%d bytes from %s: icmp_seq=%d ttl=%d time=%.3f\n", bytes - len,
 			   inet_ntoa(addr->sin_addr), ntohs(icmp->un.echo.sequence),
 			   ip->ip_ttl, rtt);
diff --git a/src/utils.c b/src/utils.c
index 804be7c..b6e2168 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -4,6 +4,7 @@
 #include <stdlib.h>
 #include <sys/time.h>
 #include <unistd.h>
+#include <math.h>
 
 void append_time(double time) {
 	if (times == NULL) {
@@ -46,7 +47,11 @@ double get_avg_rtt(void) {
 }
 
 double get_stddev_rtt(void) {
-	double stddev = 0;
+	double stddev = 0.0;
+	for (int i = 0; i < rx_count; i++) {
+		stddev += pow(times[i] - get_avg_rtt(), 2);
+	}
+	stddev = sqrt(stddev / rx_count);
 	return stddev;
 }
 
@@ -61,12 +66,10 @@ bool check_for_timeout(struct timeval start, options_t opt) {
 	return false;
 }
 
-// TODO: fix the packet loss
 void print_stats(void) {
 	printf("--- %s ping statistics ---\n", address);
-	printf("%d packets transmitted, %d packets received, %.0f%% packet loss\n",
-		   tx_count, rx_count, (tx_count - rx_count / 2.0) * 100);
-	// TODO: fix this shit
+	printf("%d packets transmitted, %d packets received, %d%% packet loss\n",
+		   tx_count, rx_count, (100 * (tx_count - rx_count) / tx_count));
 	printf("round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f\n",
 		   get_min_rtt(), get_avg_rtt(), get_max_rtt(), get_stddev_rtt());
 }