diff --git a/endlessh.c b/endlessh.c
index 745b39d..189c51f 100644
--- a/endlessh.c
+++ b/endlessh.c
@@ -253,7 +253,8 @@ main(int argc, char **argv)
                 port = tmp;
                 break;
             case 'v':
-                loglevel++;
+                if (!loglevel++)
+                    setvbuf(stdout, 0, _IOLBF, 0);
                 break;
             default:
                 usage(stderr);