diff --git a/common.c b/common.c
index d4cf479..8974f57 100644
--- a/common.c
+++ b/common.c
@@ -306,7 +306,6 @@ socks_4a_start (struct socks_connector *self)
 	}
 
 	struct str *wb = &self->write_buffer;
-	str_init (wb);
 	str_pack_u8 (wb, 4);                  // version
 	str_pack_u8 (wb, 1);                  // connect