diff --git a/src/print.c b/src/print.c
index 94e5c51..33e2ef0 100644
--- a/src/print.c
+++ b/src/print.c
@@ -14,6 +14,9 @@ void print_usage(void)
 	printf("--file: File name containing IP addresses to scan\n");
 	printf("--speedup: [250 max] number of parallel threads to use\n");
 	printf("--scan: NULL/SYN/FIN/XMAS/ACK/UDP\n");
+	printf("--max_retries: number of retries when host doesn't reply\n");
+	printf("--ttl: precise the ttl\n");
+	
 }
 
 void print_config(const struct scan *general, const char *hosts_path,