diff --git a/src/cmd/dist/unix.c b/src/cmd/dist/unix.c
index 76622a4d88..e6d82e14ef 100644
--- a/src/cmd/dist/unix.c
+++ b/src/cmd/dist/unix.c
@@ -641,6 +641,9 @@ main(int argc, char **argv)
 	Buf b;
 	struct utsname u;
 
+	setvbuf(stdout, nil, _IOLBF, 0);
+	setvbuf(stderr, nil, _IOLBF, 0);
+
 	binit(&b);
 	
 	slash = "/";