diff --git a/tests/auto/network/access/qhttp2connection/tst_qhttp2connection.cpp b/tests/auto/network/access/qhttp2connection/tst_qhttp2connection.cpp
index 94feac98e7b..4352cd427e5 100644
--- a/tests/auto/network/access/qhttp2connection/tst_qhttp2connection.cpp
+++ b/tests/auto/network/access/qhttp2connection/tst_qhttp2connection.cpp
@@ -487,7 +487,7 @@ void tst_QHttp2Connection::testBadFrameSize()
         buffer[2] = size;
 
         auto writtenN = connection->getSocket()->write(reinterpret_cast<const char *>(&buffer[0]), buffer.size());
-        QCOMPARE(writtenN, buffer.size());
+        QCOMPARE(writtenN, qint64(buffer.size()));
     }
 
     QCOMPARE(rstClientSpy.wait(), rst_received);