diff --git a/src/plugins/tls/openssl/qssldiffiehellmanparameters_openssl.cpp b/src/plugins/tls/openssl/qssldiffiehellmanparameters_openssl.cpp
index 49e583b0fd..16e31e605f 100644
--- a/src/plugins/tls/openssl/qssldiffiehellmanparameters_openssl.cpp
+++ b/src/plugins/tls/openssl/qssldiffiehellmanparameters_openssl.cpp
@@ -139,7 +139,7 @@ int QTlsBackendOpenSSL::dhParametersFromPem(const QByteArray &pem, QByteArray *d
             const int len = q_i2d_DHparams(dh, reinterpret_cast<unsigned char **>(&buf));
             const auto freeBuf = qScopeGuard([&] { q_OPENSSL_free(buf); });
             if (len > 0)
-                *data = QByteArray(buf, len);
+                data->assign({buf, len});
             else
                 return DHParams::InvalidInputDataError;
         } else {