Prevent unlikely NULL dereference
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index bca55da..a05b21e 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -3583,7 +3583,8 @@
     if( ssl->key_cert == NULL )
     {
         ssl->key_cert = key_cert;
-        ssl->handshake->key_cert = key_cert;
+        if( ssl->handshake != NULL )
+            ssl->handshake->key_cert = key_cert;
     }
     else
     {