diff --git a/src/dnsmasq.c b/src/dnsmasq.c
index 04cc982..7934132 100644
--- a/src/dnsmasq.c
+++ b/src/dnsmasq.c
@@ -81,6 +81,8 @@
 
   umask(022); /* known umask, create leases and pid files as 0644 */
  
+  setvbuf(stdout, NULL, _IONBF, 0);
+
   rand_init(); /* Must precede read_opts() */
   
   read_opts(argc, argv, compile_opts);