diff --git a/qw/source/master.c b/qw/source/master.c
index f5288f4ed..5ded91627 100644
--- a/qw/source/master.c
+++ b/qw/source/master.c
@@ -88,6 +88,7 @@ ma_log (const char *fmt, ...)
 	va_start (args, fmt);
 	vfprintf (stdout, fmt, args);
 	va_end (args);
+	fflush (stdout);
 }
 
 #ifdef HAVE_IN_PKTINFO