diff --git a/raw.c b/raw.c
index a7fbbc5c..97355e8a 100644
--- a/raw.c
+++ b/raw.c
@@ -146,6 +146,7 @@ static const char *raw_init(void *frontend_handle, void **backend_handle,
     raw->closed_on_socket_error = FALSE;
     *backend_handle = raw;
     raw->sent_console_eof = raw->sent_socket_eof = FALSE;
+    raw->bufsize = 0;
 
     raw->frontend = frontend_handle;