diff --git a/app/main.cpp b/app/main.cpp
index 42a9a345..32d4e5c2 100644
--- a/app/main.cpp
+++ b/app/main.cpp
@@ -350,14 +350,15 @@ int main(int argc, char *argv[])
     }
 #endif
 
-#ifndef Q_OS_WIN32
+#if !defined(Q_OS_WIN32) || QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     // Moonlight requires the non-threaded renderer because we depend
     // on being able to control the render thread by blocking in the
     // main thread (and pumping events from the main thread when needed).
     // That doesn't work with the threaded renderer which causes all
     // sorts of odd behavior depending on the platform.
     //
-    // NB: Windows uses the special "windows" render loop.
+    // NB: Windows defaults to the "windows" non-threaded render loop on
+    // Qt 5 and the threaded render loop on Qt 6.
     qputenv("QSG_RENDER_LOOP", "basic");
 #endif