diff --git a/src/torcontrol.cpp b/src/torcontrol.cpp
index 3665e7e77..ac13f73e7 100644
--- a/src/torcontrol.cpp
+++ b/src/torcontrol.cpp
@@ -662,7 +662,7 @@ void TorController::protocolinfo_cb(TorControlConnection& _conn, const TorContro
                 // _conn.Command("AUTHENTICATE " + HexStr(status_cookie.second), boost::bind(&TorController::auth_cb, this, _1, _2));
                 cookie = std::vector<uint8_t>(status_cookie.second.begin(), status_cookie.second.end());
                 clientNonce = std::vector<uint8_t>(TOR_NONCE_SIZE, 0);
-                GetRandBytes(&clientNonce[0], TOR_NONCE_SIZE);
+                GetRandBytes(clientNonce.data(), TOR_NONCE_SIZE);
                 _conn.Command("AUTHCHALLENGE SAFECOOKIE " + HexStr(clientNonce), boost::bind(&TorController::authchallenge_cb, this, _1, _2));
             } else {
                 if (status_cookie.first) {