diff --git a/src/gui/painting/qbackingstorerhisupport.cpp b/src/gui/painting/qbackingstorerhisupport.cpp
index 77240f0f92..e068f1880d 100644
--- a/src/gui/painting/qbackingstorerhisupport.cpp
+++ b/src/gui/painting/qbackingstorerhisupport.cpp
@@ -56,10 +56,13 @@ bool QBackingStoreRhiSupport::create()
     QOffscreenSurface *surface = nullptr;
     QRhi::Flags flags;
 
-    // This must be the same env.var. Qt Quick uses, to ensure symmetry in the
-    // behavior between a QQuickWindow and a (QRhi-based) widget top-level window.
+    // These must be the same env.vars Qt Quick uses (as documented), in order
+    // to ensure symmetry in the behavior between a QQuickWindow and a
+    // (QRhi-based) widget top-level window.
     if (qEnvironmentVariableIntValue("QSG_RHI_PREFER_SOFTWARE_RENDERER"))
         flags |= QRhi::PreferSoftwareRenderer;
+    if (qEnvironmentVariableIntValue("QSG_RHI_PROFILE"))
+        flags |= QRhi::EnableDebugMarkers | QRhi::EnableTimestamps;
 
     if (m_config.api() == QPlatformBackingStoreRhiConfig::Null) {
         QRhiNullInitParams params;