diff --git a/src/gui/util/qgraphicsframecapturemetal.mm b/src/gui/util/qgraphicsframecapturemetal.mm
index b0ff0bab2b2..fcf71dd7f6f 100644
--- a/src/gui/util/qgraphicsframecapturemetal.mm
+++ b/src/gui/util/qgraphicsframecapturemetal.mm
@@ -157,7 +157,9 @@
 
 void QGraphicsFrameCaptureMetal::updateCaptureFileName()
 {
-    m_traceURL = QUrl::fromLocalFile(m_capturePath + "/" + m_capturePrefix + "_" + QString::number(frameNumber) + ".gputrace").toNSURL();
+    m_traceURL = QUrl::fromLocalFile(m_capturePath + u"/" + m_capturePrefix + u"_"
+                                     + QString::number(frameNumber) + u".gputrace")
+                         .toNSURL();
     // We need to remove the trace file if it already existed else MTLCaptureManager
     // will fail to.
     if ([NSFileManager.defaultManager fileExistsAtPath:m_traceURL.path])