diff -r f0d934732ab1 Modules/_ssl.c
--- a/Modules/_ssl.c	Sun Jun 23 15:08:23 2013 +0200
+++ b/Modules/_ssl.c	Sun Jun 23 15:55:33 2013 +0200
@@ -1264,6 +1264,12 @@ static PyObject *PySSL_SSLwrite(PySSLSoc
         return NULL;
     }
 
+    if (buf.len > INT_MAX) {
+        PyErr_Format(PyExc_OverflowError,
+                     "string longer than %d bytes", INT_MAX);
+        goto error;
+    }
+
     /* just in case the blocking state of the socket has been changed */
     nonblocking = (sock->sock_timeout >= 0.0);
     BIO_set_nbio(SSL_get_rbio(self->ssl), nonblocking);
@@ -1284,7 +1290,6 @@ static PyObject *PySSL_SSLwrite(PySSLSoc
         goto error;
     }
     do {
-        len = (int)Py_MIN(buf.len, INT_MAX);
         PySSL_BEGIN_ALLOW_THREADS
         len = SSL_write(self->ssl, buf.buf, len);
         err = SSL_get_error(self->ssl, len);